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Finding the Fourth Proportional to 279,007.53, 385,013.16 and 156,493.15

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Solution

The fourth proportional to 279,007.53, 385,013.16 and 156,493.15 is: 215,950.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,007.53 : 385,013.16 = 156,493.15 : x
  2. Step 2: Convert to fraction form
    279,007.53/385,013.16 = 156,493.15/x
  3. Step 3: Cross multiply
    279,007.53x = 385,013.16 × 156,493.15
  4. Step 4: Simplify right side
    279,007.53x = 60,251,922,199.85
  5. Step 5: Solve for x
    x = 60,251,922,199.85/279,007.53
  6. Step 6: Final answer
    x = 215,950.88

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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.