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Finding the Fourth Proportional to 724,809.90, 1,087,214.85 and 606,711.90

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Solution

The fourth proportional to 724,809.90, 1,087,214.85 and 606,711.90 is: 910,067.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,809.90 : 1,087,214.85 = 606,711.90 : x
  2. Step 2: Convert to fraction form
    724,809.90/1,087,214.85 = 606,711.90/x
  3. Step 3: Cross multiply
    724,809.90x = 1,087,214.85 × 606,711.90
  4. Step 4: Simplify right side
    724,809.90x = 659,626,187,351.72
  5. Step 5: Solve for x
    x = 659,626,187,351.72/724,809.90
  6. Step 6: Final answer
    x = 910,067.85

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Double scale
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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.