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Finding the Fourth Proportional to 438,998.64, 658,045.98 and 172,651.20

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Solution

The fourth proportional to 438,998.64, 658,045.98 and 172,651.20 is: 258,799.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,998.64 : 658,045.98 = 172,651.20 : x
  2. Step 2: Convert to fraction form
    438,998.64/658,045.98 = 172,651.20/x
  3. Step 3: Cross multiply
    438,998.64x = 658,045.98 × 172,651.20
  4. Step 4: Simplify right side
    438,998.64x = 113,612,428,102.18
  5. Step 5: Solve for x
    x = 113,612,428,102.18/438,998.64
  6. Step 6: Final answer
    x = 258,799.04

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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.