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Finding the Fourth Proportional to 661,153.40, 991,730.10 and 656,238.20

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Solution

The fourth proportional to 661,153.40, 991,730.10 and 656,238.20 is: 984,357.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,153.40 : 991,730.10 = 656,238.20 : x
  2. Step 2: Convert to fraction form
    661,153.40/991,730.10 = 656,238.20/x
  3. Step 3: Cross multiply
    661,153.40x = 991,730.10 × 656,238.20
  4. Step 4: Simplify right side
    661,153.40x = 650,811,175,709.82
  5. Step 5: Solve for x
    x = 650,811,175,709.82/661,153.40
  6. Step 6: Final answer
    x = 984,357.30

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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.