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Finding the Fourth Proportional to 279,355.28, 385,483.50 and 156,819.56

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Solution

The fourth proportional to 279,355.28, 385,483.50 and 156,819.56 is: 216,395.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,355.28 : 385,483.50 = 156,819.56 : x
  2. Step 2: Convert to fraction form
    279,355.28/385,483.50 = 156,819.56/x
  3. Step 3: Cross multiply
    279,355.28x = 385,483.50 × 156,819.56
  4. Step 4: Simplify right side
    279,355.28x = 60,451,350,929.84
  5. Step 5: Solve for x
    x = 60,451,350,929.84/279,355.28
  6. Step 6: Final answer
    x = 216,395.95

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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.