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Finding the Fourth Proportional to 687,925.32, 949,284.90 and 386,061

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Solution

The fourth proportional to 687,925.32, 949,284.90 and 386,061 is: 532,734.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,925.32 : 949,284.90 = 386,061 : x
  2. Step 2: Convert to fraction form
    687,925.32/949,284.90 = 386,061/x
  3. Step 3: Cross multiply
    687,925.32x = 949,284.90 × 386,061
  4. Step 4: Simplify right side
    687,925.32x = 366,481,877,778.90
  5. Step 5: Solve for x
    x = 366,481,877,778.90/687,925.32
  6. Step 6: Final answer
    x = 532,734.97

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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.