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Finding the Fourth Proportional to 442,973.20, 664,459.80 and 324,000.40

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Solution

The fourth proportional to 442,973.20, 664,459.80 and 324,000.40 is: 486,000.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,973.20 : 664,459.80 = 324,000.40 : x
  2. Step 2: Convert to fraction form
    442,973.20/664,459.80 = 324,000.40/x
  3. Step 3: Cross multiply
    442,973.20x = 664,459.80 × 324,000.40
  4. Step 4: Simplify right side
    442,973.20x = 215,285,240,983.92
  5. Step 5: Solve for x
    x = 215,285,240,983.92/442,973.20
  6. Step 6: Final answer
    x = 486,000.60

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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.