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Finding the Fourth Proportional to 279,772.38, 386,073.78 and 158,913.28

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Solution

The fourth proportional to 279,772.38, 386,073.78 and 158,913.28 is: 219,293.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,772.38 : 386,073.78 = 158,913.28 : x
  2. Step 2: Convert to fraction form
    279,772.38/386,073.78 = 158,913.28/x
  3. Step 3: Cross multiply
    279,772.38x = 386,073.78 × 158,913.28
  4. Step 4: Simplify right side
    279,772.38x = 61,352,250,701.80
  5. Step 5: Solve for x
    x = 61,352,250,701.80/279,772.38
  6. Step 6: Final answer
    x = 219,293.45

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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.