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Finding the Fourth Proportional to 515,797.20, 711,752.52 and 289,401.04

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Solution

The fourth proportional to 515,797.20, 711,752.52 and 289,401.04 is: 399,346.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,797.20 : 711,752.52 = 289,401.04 : x
  2. Step 2: Convert to fraction form
    515,797.20/711,752.52 = 289,401.04/x
  3. Step 3: Cross multiply
    515,797.20x = 711,752.52 × 289,401.04
  4. Step 4: Simplify right side
    515,797.20x = 205,981,919,510.62
  5. Step 5: Solve for x
    x = 205,981,919,510.62/515,797.20
  6. Step 6: Final answer
    x = 399,346.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.