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Finding the Fourth Proportional to 256,929.86, 385,420.68 and 88,428.04

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Solution

The fourth proportional to 256,929.86, 385,420.68 and 88,428.04 is: 132,650.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,929.86 : 385,420.68 = 88,428.04 : x
  2. Step 2: Convert to fraction form
    256,929.86/385,420.68 = 88,428.04/x
  3. Step 3: Cross multiply
    256,929.86x = 385,420.68 × 88,428.04
  4. Step 4: Simplify right side
    256,929.86x = 34,081,994,344.32
  5. Step 5: Solve for x
    x = 34,081,994,344.32/256,929.86
  6. Step 6: Final answer
    x = 132,650.97

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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.