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Finding the Fourth Proportional to 439,626.80, 659,440.20 and 321,528.80

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Solution

The fourth proportional to 439,626.80, 659,440.20 and 321,528.80 is: 482,293.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,626.80 : 659,440.20 = 321,528.80 : x
  2. Step 2: Convert to fraction form
    439,626.80/659,440.20 = 321,528.80/x
  3. Step 3: Cross multiply
    439,626.80x = 659,440.20 × 321,528.80
  4. Step 4: Simplify right side
    439,626.80x = 212,029,016,177.76
  5. Step 5: Solve for x
    x = 212,029,016,177.76/439,626.80
  6. Step 6: Final answer
    x = 482,293.20

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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.