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Finding the Fourth Proportional to 519,781.60, 779,672.40 and 253,712.80

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Solution

The fourth proportional to 519,781.60, 779,672.40 and 253,712.80 is: 380,569.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,781.60 : 779,672.40 = 253,712.80 : x
  2. Step 2: Convert to fraction form
    519,781.60/779,672.40 = 253,712.80/x
  3. Step 3: Cross multiply
    519,781.60x = 779,672.40 × 253,712.80
  4. Step 4: Simplify right side
    519,781.60x = 197,812,867,686.72
  5. Step 5: Solve for x
    x = 197,812,867,686.72/519,781.60
  6. Step 6: Final answer
    x = 380,569.20

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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.