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Finding the Fourth Proportional to 438,807.78, 658,211.67 and 154,431.36

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Solution

The fourth proportional to 438,807.78, 658,211.67 and 154,431.36 is: 231,647.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,807.78 : 658,211.67 = 154,431.36 : x
  2. Step 2: Convert to fraction form
    438,807.78/658,211.67 = 154,431.36/x
  3. Step 3: Cross multiply
    438,807.78x = 658,211.67 × 154,431.36
  4. Step 4: Simplify right side
    438,807.78x = 101,648,523,365.97
  5. Step 5: Solve for x
    x = 101,648,523,365.97/438,807.78
  6. Step 6: Final answer
    x = 231,647.04

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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.