Home / 812,078.60-1,218,117.90-664,456.10

Finding the Fourth Proportional to 812,078.60, 1,218,117.90 and 664,456.10

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Solution

The fourth proportional to 812,078.60, 1,218,117.90 and 664,456.10 is: 996,684.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,078.60 : 1,218,117.90 = 664,456.10 : x
  2. Step 2: Convert to fraction form
    812,078.60/1,218,117.90 = 664,456.10/x
  3. Step 3: Cross multiply
    812,078.60x = 1,218,117.90 × 664,456.10
  4. Step 4: Simplify right side
    812,078.60x = 809,385,869,174.19
  5. Step 5: Solve for x
    x = 809,385,869,174.19/812,078.60
  6. Step 6: Final answer
    x = 996,684.15

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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.