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Finding the Fourth Proportional to 661,149.40, 991,724.10 and 656,234.20

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Solution

The fourth proportional to 661,149.40, 991,724.10 and 656,234.20 is: 984,351.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,149.40 : 991,724.10 = 656,234.20 : x
  2. Step 2: Convert to fraction form
    661,149.40/991,724.10 = 656,234.20/x
  3. Step 3: Cross multiply
    661,149.40x = 991,724.10 × 656,234.20
  4. Step 4: Simplify right side
    661,149.40x = 650,803,271,384.22
  5. Step 5: Solve for x
    x = 650,803,271,384.22/661,149.40
  6. Step 6: Final answer
    x = 984,351.30

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Half scale
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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.