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Finding the Fourth Proportional to 653,918.20, 981,503.70 and 338,601.40

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Solution

The fourth proportional to 653,918.20, 981,503.70 and 338,601.40 is: 508,226.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,918.20 : 981,503.70 = 338,601.40 : x
  2. Step 2: Convert to fraction form
    653,918.20/981,503.70 = 338,601.40/x
  3. Step 3: Cross multiply
    653,918.20x = 981,503.70 × 338,601.40
  4. Step 4: Simplify right side
    653,918.20x = 332,338,526,925.18
  5. Step 5: Solve for x
    x = 332,338,526,925.18/653,918.20
  6. Step 6: Final answer
    x = 508,226.45

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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.