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Finding the Fourth Proportional to 439,428.80, 659,143.20 and 384,132.80

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Solution

The fourth proportional to 439,428.80, 659,143.20 and 384,132.80 is: 576,199.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,428.80 : 659,143.20 = 384,132.80 : x
  2. Step 2: Convert to fraction form
    439,428.80/659,143.20 = 384,132.80/x
  3. Step 3: Cross multiply
    439,428.80x = 659,143.20 × 384,132.80
  4. Step 4: Simplify right side
    439,428.80x = 253,198,523,016.96
  5. Step 5: Solve for x
    x = 253,198,523,016.96/439,428.80
  6. Step 6: Final answer
    x = 576,199.20

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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.