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Finding the Fourth Proportional to 648,003.20, 972,004.80 and 396,060.80

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Solution

The fourth proportional to 648,003.20, 972,004.80 and 396,060.80 is: 594,091.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,003.20 : 972,004.80 = 396,060.80 : x
  2. Step 2: Convert to fraction form
    648,003.20/972,004.80 = 396,060.80/x
  3. Step 3: Cross multiply
    648,003.20x = 972,004.80 × 396,060.80
  4. Step 4: Simplify right side
    648,003.20x = 384,972,998,691.84
  5. Step 5: Solve for x
    x = 384,972,998,691.84/648,003.20
  6. Step 6: Final answer
    x = 594,091.20

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Similar ratio
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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.