Home / 905,881.68-1,250,132.64-498,000.72

Finding the Fourth Proportional to 905,881.68, 1,250,132.64 and 498,000.72

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Solution

The fourth proportional to 905,881.68, 1,250,132.64 and 498,000.72 is: 687,249.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    905,881.68 : 1,250,132.64 = 498,000.72 : x
  2. Step 2: Convert to fraction form
    905,881.68/1,250,132.64 = 498,000.72/x
  3. Step 3: Cross multiply
    905,881.68x = 1,250,132.64 × 498,000.72
  4. Step 4: Simplify right side
    905,881.68x = 622,566,954,815.50
  5. Step 5: Solve for x
    x = 622,566,954,815.50/905,881.68
  6. Step 6: Final answer
    x = 687,249.75

Related Problems

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Half scale
Find fourth proportional to 1,811,763.36, 2,500,265.28 and 996,001.44
Double scale
Find fourth proportional to 905,882.68, 1,250,134.02 and 498,001.72
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.