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Finding the Fourth Proportional to 439,851.30, 659,776.95 and 389,987.70

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Solution

The fourth proportional to 439,851.30, 659,776.95 and 389,987.70 is: 584,981.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,851.30 : 659,776.95 = 389,987.70 : x
  2. Step 2: Convert to fraction form
    439,851.30/659,776.95 = 389,987.70/x
  3. Step 3: Cross multiply
    439,851.30x = 659,776.95 × 389,987.70
  4. Step 4: Simplify right side
    439,851.30x = 257,304,895,243.52
  5. Step 5: Solve for x
    x = 257,304,895,243.52/439,851.30
  6. Step 6: Final answer
    x = 584,981.55

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Similar ratio
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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.