Home / 661,147.40-991,721.10-656,232.20

Finding the Fourth Proportional to 661,147.40, 991,721.10 and 656,232.20

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Solution

The fourth proportional to 661,147.40, 991,721.10 and 656,232.20 is: 984,348.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,147.40 : 991,721.10 = 656,232.20 : x
  2. Step 2: Convert to fraction form
    661,147.40/991,721.10 = 656,232.20/x
  3. Step 3: Cross multiply
    661,147.40x = 991,721.10 × 656,232.20
  4. Step 4: Simplify right side
    661,147.40x = 650,799,319,239.42
  5. Step 5: Solve for x
    x = 650,799,319,239.42/661,147.40
  6. Step 6: Final answer
    x = 984,348.30

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Double scale
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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.