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Finding the Fourth Proportional to 438,879.78, 658,319.67 and 154,503.36

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Solution

The fourth proportional to 438,879.78, 658,319.67 and 154,503.36 is: 231,755.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,879.78 : 658,319.67 = 154,503.36 : x
  2. Step 2: Convert to fraction form
    438,879.78/658,319.67 = 154,503.36/x
  3. Step 3: Cross multiply
    438,879.78x = 658,319.67 × 154,503.36
  4. Step 4: Simplify right side
    438,879.78x = 101,712,600,969.09
  5. Step 5: Solve for x
    x = 101,712,600,969.09/438,879.78
  6. Step 6: Final answer
    x = 231,755.04

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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.