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Finding the Fourth Proportional to 279,459.15, 385,652.49 and 156,934.50

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Solution

The fourth proportional to 279,459.15, 385,652.49 and 156,934.50 is: 216,568.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,459.15 : 385,652.49 = 156,934.50 : x
  2. Step 2: Convert to fraction form
    279,459.15/385,652.49 = 156,934.50/x
  3. Step 3: Cross multiply
    279,459.15x = 385,652.49 × 156,934.50
  4. Step 4: Simplify right side
    279,459.15x = 60,522,180,691.91
  5. Step 5: Solve for x
    x = 60,522,180,691.91/279,459.15
  6. Step 6: Final answer
    x = 216,568.97

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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.