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Finding the Fourth Proportional to 407,981.57, 611,972.24 and 127,498.82

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Solution

The fourth proportional to 407,981.57, 611,972.24 and 127,498.82 is: 191,248.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,981.57 : 611,972.24 = 127,498.82 : x
  2. Step 2: Convert to fraction form
    407,981.57/611,972.24 = 127,498.82/x
  3. Step 3: Cross multiply
    407,981.57x = 611,972.24 × 127,498.82
  4. Step 4: Simplify right side
    407,981.57x = 78,025,734,775.40
  5. Step 5: Solve for x
    x = 78,025,734,775.40/407,981.57
  6. Step 6: Final answer
    x = 191,248.19

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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.