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Finding the Fourth Proportional to 347,915.20, 521,930.40 and 148,331.20

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Solution

The fourth proportional to 347,915.20, 521,930.40 and 148,331.20 is: 222,521.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,915.20 : 521,930.40 = 148,331.20 : x
  2. Step 2: Convert to fraction form
    347,915.20/521,930.40 = 148,331.20/x
  3. Step 3: Cross multiply
    347,915.20x = 521,930.40 × 148,331.20
  4. Step 4: Simplify right side
    347,915.20x = 77,418,562,548.48
  5. Step 5: Solve for x
    x = 77,418,562,548.48/347,915.20
  6. Step 6: Final answer
    x = 222,521.36

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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.