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Finding the Fourth Proportional to 574,012.80, 861,019.20 and 495,280.80

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Solution

The fourth proportional to 574,012.80, 861,019.20 and 495,280.80 is: 742,921.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    574,012.80 : 861,019.20 = 495,280.80 : x
  2. Step 2: Convert to fraction form
    574,012.80/861,019.20 = 495,280.80/x
  3. Step 3: Cross multiply
    574,012.80x = 861,019.20 × 495,280.80
  4. Step 4: Simplify right side
    574,012.80x = 426,446,278,191.36
  5. Step 5: Solve for x
    x = 426,446,278,191.36/574,012.80
  6. Step 6: Final answer
    x = 742,921.20

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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.