Home / 687,003.60-1,030,505.40-640,347.60

Finding the Fourth Proportional to 687,003.60, 1,030,505.40 and 640,347.60

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Solution

The fourth proportional to 687,003.60, 1,030,505.40 and 640,347.60 is: 960,521.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,003.60 : 1,030,505.40 = 640,347.60 : x
  2. Step 2: Convert to fraction form
    687,003.60/1,030,505.40 = 640,347.60/x
  3. Step 3: Cross multiply
    687,003.60x = 1,030,505.40 × 640,347.60
  4. Step 4: Simplify right side
    687,003.60x = 659,881,659,677.04
  5. Step 5: Solve for x
    x = 659,881,659,677.04/687,003.60
  6. Step 6: Final answer
    x = 960,521.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.