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Finding the Fourth Proportional to 297,011.20, 445,516.80 and 86,621.80

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Solution

The fourth proportional to 297,011.20, 445,516.80 and 86,621.80 is: 129,932.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,011.20 : 445,516.80 = 86,621.80 : x
  2. Step 2: Convert to fraction form
    297,011.20/445,516.80 = 86,621.80/x
  3. Step 3: Cross multiply
    297,011.20x = 445,516.80 × 86,621.80
  4. Step 4: Simplify right side
    297,011.20x = 38,591,467,146.24
  5. Step 5: Solve for x
    x = 38,591,467,146.24/297,011.20
  6. Step 6: Final answer
    x = 129,932.70

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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.