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Finding the Fourth Proportional to 661,637.70, 992,456.55 and 451,685.70

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Solution

The fourth proportional to 661,637.70, 992,456.55 and 451,685.70 is: 677,528.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,637.70 : 992,456.55 = 451,685.70 : x
  2. Step 2: Convert to fraction form
    661,637.70/992,456.55 = 451,685.70/x
  3. Step 3: Cross multiply
    661,637.70x = 992,456.55 × 451,685.70
  4. Step 4: Simplify right side
    661,637.70x = 448,278,431,506.34
  5. Step 5: Solve for x
    x = 448,278,431,506.34/661,637.70
  6. Step 6: Final answer
    x = 677,528.55

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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.