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Finding the Fourth Proportional to 661,154.40, 991,731.60 and 656,239.20

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Solution

The fourth proportional to 661,154.40, 991,731.60 and 656,239.20 is: 984,358.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,154.40 : 991,731.60 = 656,239.20 : x
  2. Step 2: Convert to fraction form
    661,154.40/991,731.60 = 656,239.20/x
  3. Step 3: Cross multiply
    661,154.40x = 991,731.60 × 656,239.20
  4. Step 4: Simplify right side
    661,154.40x = 650,813,151,798.72
  5. Step 5: Solve for x
    x = 650,813,151,798.72/661,154.40
  6. Step 6: Final answer
    x = 984,358.80

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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.