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Finding the Fourth Proportional to 474,279.60, 711,176.20 and 141,812.40

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Solution

The fourth proportional to 474,279.60, 711,176.20 and 141,812.40 is: 212,645.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    474,279.60 : 711,176.20 = 141,812.40 : x
  2. Step 2: Convert to fraction form
    474,279.60/711,176.20 = 141,812.40/x
  3. Step 3: Cross multiply
    474,279.60x = 711,176.20 × 141,812.40
  4. Step 4: Simplify right side
    474,279.60x = 100,853,603,744.88
  5. Step 5: Solve for x
    x = 100,853,603,744.88/474,279.60
  6. Step 6: Final answer
    x = 212,645.88

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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.