Home / 642,712.64-886,949.92-356,239.04

Finding the Fourth Proportional to 642,712.64, 886,949.92 and 356,239.04

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Solution

The fourth proportional to 642,712.64, 886,949.92 and 356,239.04 is: 491,613.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,712.64 : 886,949.92 = 356,239.04 : x
  2. Step 2: Convert to fraction form
    642,712.64/886,949.92 = 356,239.04/x
  3. Step 3: Cross multiply
    642,712.64x = 886,949.92 × 356,239.04
  4. Step 4: Simplify right side
    642,712.64x = 315,966,188,028.88
  5. Step 5: Solve for x
    x = 315,966,188,028.88/642,712.64
  6. Step 6: Final answer
    x = 491,613.47

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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.