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Finding the Fourth Proportional to 665,687.70, 998,531.55 and 453,111.30

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Solution

The fourth proportional to 665,687.70, 998,531.55 and 453,111.30 is: 679,666.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,687.70 : 998,531.55 = 453,111.30 : x
  2. Step 2: Convert to fraction form
    665,687.70/998,531.55 = 453,111.30/x
  3. Step 3: Cross multiply
    665,687.70x = 998,531.55 × 453,111.30
  4. Step 4: Simplify right side
    665,687.70x = 452,445,928,711.52
  5. Step 5: Solve for x
    x = 452,445,928,711.52/665,687.70
  6. Step 6: Final answer
    x = 679,666.95

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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.