Home / 1,417.62-2,126.21-724.80

Finding the Fourth Proportional to 1,417.62, 2,126.21 and 724.80

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Solution

The fourth proportional to 1,417.62, 2,126.21 and 724.80 is: 1,087.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,417.62 : 2,126.21 = 724.80 : x
  2. Step 2: Convert to fraction form
    1,417.62/2,126.21 = 724.80/x
  3. Step 3: Cross multiply
    1,417.62x = 2,126.21 × 724.80
  4. Step 4: Simplify right side
    1,417.62x = 1,541,073.38
  5. Step 5: Solve for x
    x = 1,541,073.38/1,417.62
  6. Step 6: Final answer
    x = 1,087.08

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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.