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Finding the Fourth Proportional to 520,920.60, 781,380.90 and 254,851.80

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Solution

The fourth proportional to 520,920.60, 781,380.90 and 254,851.80 is: 382,277.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,920.60 : 781,380.90 = 254,851.80 : x
  2. Step 2: Convert to fraction form
    520,920.60/781,380.90 = 254,851.80/x
  3. Step 3: Cross multiply
    520,920.60x = 781,380.90 × 254,851.80
  4. Step 4: Simplify right side
    520,920.60x = 199,136,328,850.62
  5. Step 5: Solve for x
    x = 199,136,328,850.62/520,920.60
  6. Step 6: Final answer
    x = 382,277.70

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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.