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Finding the Fourth Proportional to 279,836.76, 386,064.88 and 172,219.94

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Solution

The fourth proportional to 279,836.76, 386,064.88 and 172,219.94 is: 237,595.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,836.76 : 386,064.88 = 172,219.94 : x
  2. Step 2: Convert to fraction form
    279,836.76/386,064.88 = 172,219.94/x
  3. Step 3: Cross multiply
    279,836.76x = 386,064.88 × 172,219.94
  4. Step 4: Simplify right side
    279,836.76x = 66,488,070,469.71
  5. Step 5: Solve for x
    x = 66,488,070,469.71/279,836.76
  6. Step 6: Final answer
    x = 237,595.91

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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.