Home / 687,660.30-1,031,490.45-435,717.90

Finding the Fourth Proportional to 687,660.30, 1,031,490.45 and 435,717.90

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Solution

The fourth proportional to 687,660.30, 1,031,490.45 and 435,717.90 is: 653,576.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,660.30 : 1,031,490.45 = 435,717.90 : x
  2. Step 2: Convert to fraction form
    687,660.30/1,031,490.45 = 435,717.90/x
  3. Step 3: Cross multiply
    687,660.30x = 1,031,490.45 × 435,717.90
  4. Step 4: Simplify right side
    687,660.30x = 449,438,852,744.06
  5. Step 5: Solve for x
    x = 449,438,852,744.06/687,660.30
  6. Step 6: Final answer
    x = 653,576.85

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Double scale
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Similar ratio
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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.