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Finding the Fourth Proportional to 485,073.80, 727,610.70 and 148,113.80

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Solution

The fourth proportional to 485,073.80, 727,610.70 and 148,113.80 is: 222,170.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,073.80 : 727,610.70 = 148,113.80 : x
  2. Step 2: Convert to fraction form
    485,073.80/727,610.70 = 148,113.80/x
  3. Step 3: Cross multiply
    485,073.80x = 727,610.70 × 148,113.80
  4. Step 4: Simplify right side
    485,073.80x = 107,769,185,697.66
  5. Step 5: Solve for x
    x = 107,769,185,697.66/485,073.80
  6. Step 6: Final answer
    x = 222,170.70

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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.