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Finding the Fourth Proportional to 661,085.70, 991,628.55 and 451,133.70

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Solution

The fourth proportional to 661,085.70, 991,628.55 and 451,133.70 is: 676,700.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,085.70 : 991,628.55 = 451,133.70 : x
  2. Step 2: Convert to fraction form
    661,085.70/991,628.55 = 451,133.70/x
  3. Step 3: Cross multiply
    661,085.70x = 991,628.55 × 451,133.70
  4. Step 4: Simplify right side
    661,085.70x = 447,357,056,787.14
  5. Step 5: Solve for x
    x = 447,357,056,787.14/661,085.70
  6. Step 6: Final answer
    x = 676,700.55

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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.