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Finding the Fourth Proportional to 439,542.80, 659,314.20 and 321,444.80

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Solution

The fourth proportional to 439,542.80, 659,314.20 and 321,444.80 is: 482,167.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,542.80 : 659,314.20 = 321,444.80 : x
  2. Step 2: Convert to fraction form
    439,542.80/659,314.20 = 321,444.80/x
  3. Step 3: Cross multiply
    439,542.80x = 659,314.20 × 321,444.80
  4. Step 4: Simplify right side
    439,542.80x = 211,933,121,156.16
  5. Step 5: Solve for x
    x = 211,933,121,156.16/439,542.80
  6. Step 6: Final answer
    x = 482,167.20

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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.