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Finding the Fourth Proportional to 347,842.80, 521,375.40 and 148,129.20

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Solution

The fourth proportional to 347,842.80, 521,375.40 and 148,129.20 is: 222,028.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,842.80 : 521,375.40 = 148,129.20 : x
  2. Step 2: Convert to fraction form
    347,842.80/521,375.40 = 148,129.20/x
  3. Step 3: Cross multiply
    347,842.80x = 521,375.40 × 148,129.20
  4. Step 4: Simplify right side
    347,842.80x = 77,230,920,901.68
  5. Step 5: Solve for x
    x = 77,230,920,901.68/347,842.80
  6. Step 6: Final answer
    x = 222,028.23

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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.