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Finding the Fourth Proportional to 253,142.40, 379,713.60 and 147,907.20

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Solution

The fourth proportional to 253,142.40, 379,713.60 and 147,907.20 is: 221,860.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,142.40 : 379,713.60 = 147,907.20 : x
  2. Step 2: Convert to fraction form
    253,142.40/379,713.60 = 147,907.20/x
  3. Step 3: Cross multiply
    253,142.40x = 379,713.60 × 147,907.20
  4. Step 4: Simplify right side
    253,142.40x = 56,162,375,377.92
  5. Step 5: Solve for x
    x = 56,162,375,377.92/253,142.40
  6. Step 6: Final answer
    x = 221,860.80

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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.