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Finding the Fourth Proportional to 415,331.80, 623,289.30 and 178,844.20

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Solution

The fourth proportional to 415,331.80, 623,289.30 and 178,844.20 is: 268,391.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,331.80 : 623,289.30 = 178,844.20 : x
  2. Step 2: Convert to fraction form
    415,331.80/623,289.30 = 178,844.20/x
  3. Step 3: Cross multiply
    415,331.80x = 623,289.30 × 178,844.20
  4. Step 4: Simplify right side
    415,331.80x = 111,471,676,227.06
  5. Step 5: Solve for x
    x = 111,471,676,227.06/415,331.80
  6. Step 6: Final answer
    x = 268,391.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.