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Finding the Fourth Proportional to 485,180.80, 727,771.20 and 148,220.80

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Solution

The fourth proportional to 485,180.80, 727,771.20 and 148,220.80 is: 222,331.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,180.80 : 727,771.20 = 148,220.80 : x
  2. Step 2: Convert to fraction form
    485,180.80/727,771.20 = 148,220.80/x
  3. Step 3: Cross multiply
    485,180.80x = 727,771.20 × 148,220.80
  4. Step 4: Simplify right side
    485,180.80x = 107,870,829,480.96
  5. Step 5: Solve for x
    x = 107,870,829,480.96/485,180.80
  6. Step 6: Final answer
    x = 222,331.20

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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.