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Finding the Fourth Proportional to 279,456.64, 385,649.05 and 156,932.01

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Solution

The fourth proportional to 279,456.64, 385,649.05 and 156,932.01 is: 216,565.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,456.64 : 385,649.05 = 156,932.01 : x
  2. Step 2: Convert to fraction form
    279,456.64/385,649.05 = 156,932.01/x
  3. Step 3: Cross multiply
    279,456.64x = 385,649.05 × 156,932.01
  4. Step 4: Simplify right side
    279,456.64x = 60,520,680,571.09
  5. Step 5: Solve for x
    x = 60,520,680,571.09/279,456.64
  6. Step 6: Final answer
    x = 216,565.55

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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.