Home / 687,175.84-1,031,167.14-287,785.90

Finding the Fourth Proportional to 687,175.84, 1,031,167.14 and 287,785.90

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Solution

The fourth proportional to 687,175.84, 1,031,167.14 and 287,785.90 is: 431,847.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,175.84 : 1,031,167.14 = 287,785.90 : x
  2. Step 2: Convert to fraction form
    687,175.84/1,031,167.14 = 287,785.90/x
  3. Step 3: Cross multiply
    687,175.84x = 1,031,167.14 × 287,785.90
  4. Step 4: Simplify right side
    687,175.84x = 296,755,363,435.33
  5. Step 5: Solve for x
    x = 296,755,363,435.33/687,175.84
  6. Step 6: Final answer
    x = 431,847.78

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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.