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Finding the Fourth Proportional to 485,707.32, 728,645.22 and 148,740.03

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Solution

The fourth proportional to 485,707.32, 728,645.22 and 148,740.03 is: 223,135.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,707.32 : 728,645.22 = 148,740.03 : x
  2. Step 2: Convert to fraction form
    485,707.32/728,645.22 = 148,740.03/x
  3. Step 3: Cross multiply
    485,707.32x = 728,645.22 × 148,740.03
  4. Step 4: Simplify right side
    485,707.32x = 108,378,711,882.16
  5. Step 5: Solve for x
    x = 108,378,711,882.16/485,707.32
  6. Step 6: Final answer
    x = 223,135.84

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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.