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Finding the Fourth Proportional to 438,189.60, 656,830.80 and 238,087.20

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Solution

The fourth proportional to 438,189.60, 656,830.80 and 238,087.20 is: 356,884.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,189.60 : 656,830.80 = 238,087.20 : x
  2. Step 2: Convert to fraction form
    438,189.60/656,830.80 = 238,087.20/x
  3. Step 3: Cross multiply
    438,189.60x = 656,830.80 × 238,087.20
  4. Step 4: Simplify right side
    438,189.60x = 156,383,006,045.76
  5. Step 5: Solve for x
    x = 156,383,006,045.76/438,189.60
  6. Step 6: Final answer
    x = 356,884.34

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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.