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Finding the Fourth Proportional to 665,394.80, 998,378.16 and 216,253.32

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Solution

The fourth proportional to 665,394.80, 998,378.16 and 216,253.32 is: 324,472.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,394.80 : 998,378.16 = 216,253.32 : x
  2. Step 2: Convert to fraction form
    665,394.80/998,378.16 = 216,253.32/x
  3. Step 3: Cross multiply
    665,394.80x = 998,378.16 × 216,253.32
  4. Step 4: Simplify right side
    665,394.80x = 215,902,591,715.49
  5. Step 5: Solve for x
    x = 215,902,591,715.49/665,394.80
  6. Step 6: Final answer
    x = 324,472.92

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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.