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Finding the Fourth Proportional to 657,908.70, 986,863.05 and 651,687.90

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Solution

The fourth proportional to 657,908.70, 986,863.05 and 651,687.90 is: 977,531.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,908.70 : 986,863.05 = 651,687.90 : x
  2. Step 2: Convert to fraction form
    657,908.70/986,863.05 = 651,687.90/x
  3. Step 3: Cross multiply
    657,908.70x = 986,863.05 × 651,687.90
  4. Step 4: Simplify right side
    657,908.70x = 643,126,708,642.10
  5. Step 5: Solve for x
    x = 643,126,708,642.10/657,908.70
  6. Step 6: Final answer
    x = 977,531.85

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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.