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Finding the Fourth Proportional to 661,491.40, 992,237.10 and 656,825.80

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Solution

The fourth proportional to 661,491.40, 992,237.10 and 656,825.80 is: 985,238.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,491.40 : 992,237.10 = 656,825.80 : x
  2. Step 2: Convert to fraction form
    661,491.40/992,237.10 = 656,825.80/x
  3. Step 3: Cross multiply
    661,491.40x = 992,237.10 × 656,825.80
  4. Step 4: Simplify right side
    661,491.40x = 651,726,926,997.18
  5. Step 5: Solve for x
    x = 651,726,926,997.18/661,491.40
  6. Step 6: Final answer
    x = 985,238.70

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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.