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Finding the Fourth Proportional to 579,517.20, 869,275.80 and 366,940.80

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Solution

The fourth proportional to 579,517.20, 869,275.80 and 366,940.80 is: 550,411.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,517.20 : 869,275.80 = 366,940.80 : x
  2. Step 2: Convert to fraction form
    579,517.20/869,275.80 = 366,940.80/x
  3. Step 3: Cross multiply
    579,517.20x = 869,275.80 × 366,940.80
  4. Step 4: Simplify right side
    579,517.20x = 318,972,757,472.64
  5. Step 5: Solve for x
    x = 318,972,757,472.64/579,517.20
  6. Step 6: Final answer
    x = 550,411.20

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Double scale
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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.