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Finding the Fourth Proportional to 661,159.40, 991,739.10 and 656,244.20

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Solution

The fourth proportional to 661,159.40, 991,739.10 and 656,244.20 is: 984,366.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,159.40 : 991,739.10 = 656,244.20 : x
  2. Step 2: Convert to fraction form
    661,159.40/991,739.10 = 656,244.20/x
  3. Step 3: Cross multiply
    661,159.40x = 991,739.10 × 656,244.20
  4. Step 4: Simplify right side
    661,159.40x = 650,823,032,288.22
  5. Step 5: Solve for x
    x = 650,823,032,288.22/661,159.40
  6. Step 6: Final answer
    x = 984,366.30

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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.