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Finding the Fourth Proportional to 485,604.80, 728,381.24 and 148,645.60

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Solution

The fourth proportional to 485,604.80, 728,381.24 and 148,645.60 is: 222,960.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,604.80 : 728,381.24 = 148,645.60 : x
  2. Step 2: Convert to fraction form
    485,604.80/728,381.24 = 148,645.60/x
  3. Step 3: Cross multiply
    485,604.80x = 728,381.24 × 148,645.60
  4. Step 4: Simplify right side
    485,604.80x = 108,270,666,448.54
  5. Step 5: Solve for x
    x = 108,270,666,448.54/485,604.80
  6. Step 6: Final answer
    x = 222,960.45

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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.