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Finding the Fourth Proportional to 479,140.80, 718,711.20 and 440,433.60

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Solution

The fourth proportional to 479,140.80, 718,711.20 and 440,433.60 is: 660,650.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,140.80 : 718,711.20 = 440,433.60 : x
  2. Step 2: Convert to fraction form
    479,140.80/718,711.20 = 440,433.60/x
  3. Step 3: Cross multiply
    479,140.80x = 718,711.20 × 440,433.60
  4. Step 4: Simplify right side
    479,140.80x = 316,544,561,176.32
  5. Step 5: Solve for x
    x = 316,544,561,176.32/479,140.80
  6. Step 6: Final answer
    x = 660,650.40

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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.