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Finding the Fourth Proportional to 438,420.30, 658,321.65 and 251,796.30

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Solution

The fourth proportional to 438,420.30, 658,321.65 and 251,796.30 is: 378,091.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,420.30 : 658,321.65 = 251,796.30 : x
  2. Step 2: Convert to fraction form
    438,420.30/658,321.65 = 251,796.30/x
  3. Step 3: Cross multiply
    438,420.30x = 658,321.65 × 251,796.30
  4. Step 4: Simplify right side
    438,420.30x = 165,762,955,679.90
  5. Step 5: Solve for x
    x = 165,762,955,679.90/438,420.30
  6. Step 6: Final answer
    x = 378,091.42

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1.5x scale

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.