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Finding the Fourth Proportional to 253,888.47, 380,789.55 and 76,353.89

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Solution

The fourth proportional to 253,888.47, 380,789.55 and 76,353.89 is: 114,517.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,888.47 : 380,789.55 = 76,353.89 : x
  2. Step 2: Convert to fraction form
    253,888.47/380,789.55 = 76,353.89/x
  3. Step 3: Cross multiply
    253,888.47x = 380,789.55 × 76,353.89
  4. Step 4: Simplify right side
    253,888.47x = 29,074,761,509.90
  5. Step 5: Solve for x
    x = 29,074,761,509.90/253,888.47
  6. Step 6: Final answer
    x = 114,517.85

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1.5x scale

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.