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Finding the Fourth Proportional to 279,798.87, 386,103.96 and 157,310.13

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Solution

The fourth proportional to 279,798.87, 386,103.96 and 157,310.13 is: 217,077.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,798.87 : 386,103.96 = 157,310.13 : x
  2. Step 2: Convert to fraction form
    279,798.87/386,103.96 = 157,310.13/x
  3. Step 3: Cross multiply
    279,798.87x = 386,103.96 × 157,310.13
  4. Step 4: Simplify right side
    279,798.87x = 60,738,064,141.11
  5. Step 5: Solve for x
    x = 60,738,064,141.11/279,798.87
  6. Step 6: Final answer
    x = 217,077.59

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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.