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Finding the Fourth Proportional to 639,578.20, 959,191.80 and 240,188.80

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Solution

The fourth proportional to 639,578.20, 959,191.80 and 240,188.80 is: 360,217.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,578.20 : 959,191.80 = 240,188.80 : x
  2. Step 2: Convert to fraction form
    639,578.20/959,191.80 = 240,188.80/x
  3. Step 3: Cross multiply
    639,578.20x = 959,191.80 × 240,188.80
  4. Step 4: Simplify right side
    639,578.20x = 230,387,127,411.84
  5. Step 5: Solve for x
    x = 230,387,127,411.84/639,578.20
  6. Step 6: Final answer
    x = 360,217.29

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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.