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Finding the Fourth Proportional to 657,338.49, 986,155.43 and 208,086.30

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Solution

The fourth proportional to 657,338.49, 986,155.43 and 208,086.30 is: 312,176.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,338.49 : 986,155.43 = 208,086.30 : x
  2. Step 2: Convert to fraction form
    657,338.49/986,155.43 = 208,086.30/x
  3. Step 3: Cross multiply
    657,338.49x = 986,155.43 × 208,086.30
  4. Step 4: Simplify right side
    657,338.49x = 205,205,433,613.18
  5. Step 5: Solve for x
    x = 205,205,433,613.18/657,338.49
  6. Step 6: Final answer
    x = 312,176.20

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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.