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Finding the Fourth Proportional to 642,727.32, 887,016.78 and 356,337.24

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Solution

The fourth proportional to 642,727.32, 887,016.78 and 356,337.24 is: 491,774.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,727.32 : 887,016.78 = 356,337.24 : x
  2. Step 2: Convert to fraction form
    642,727.32/887,016.78 = 356,337.24/x
  3. Step 3: Cross multiply
    642,727.32x = 887,016.78 × 356,337.24
  4. Step 4: Simplify right side
    642,727.32x = 316,077,111,218.89
  5. Step 5: Solve for x
    x = 316,077,111,218.89/642,727.32
  6. Step 6: Final answer
    x = 491,774.82

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1.5x scale

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.