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Finding the Fourth Proportional to 438,866.96, 658,113.51 and 172,440.58

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Solution

The fourth proportional to 438,866.96, 658,113.51 and 172,440.58 is: 258,587.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,866.96 : 658,113.51 = 172,440.58 : x
  2. Step 2: Convert to fraction form
    438,866.96/658,113.51 = 172,440.58/x
  3. Step 3: Cross multiply
    438,866.96x = 658,113.51 × 172,440.58
  4. Step 4: Simplify right side
    438,866.96x = 113,485,473,724.95
  5. Step 5: Solve for x
    x = 113,485,473,724.95/438,866.96
  6. Step 6: Final answer
    x = 258,587.42

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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.