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Finding the Fourth Proportional to 313,997.40, 471,105.45 and 136,631.70

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Solution

The fourth proportional to 313,997.40, 471,105.45 and 136,631.70 is: 204,995.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,997.40 : 471,105.45 = 136,631.70 : x
  2. Step 2: Convert to fraction form
    313,997.40/471,105.45 = 136,631.70/x
  3. Step 3: Cross multiply
    313,997.40x = 471,105.45 × 136,631.70
  4. Step 4: Simplify right side
    313,997.40x = 64,367,938,512.77
  5. Step 5: Solve for x
    x = 64,367,938,512.77/313,997.40
  6. Step 6: Final answer
    x = 204,995.13

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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.