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Finding the Fourth Proportional to 348,274.80, 521,375.40 and 207,961.20

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Solution

The fourth proportional to 348,274.80, 521,375.40 and 207,961.20 is: 311,322.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,274.80 : 521,375.40 = 207,961.20 : x
  2. Step 2: Convert to fraction form
    348,274.80/521,375.40 = 207,961.20/x
  3. Step 3: Cross multiply
    348,274.80x = 521,375.40 × 207,961.20
  4. Step 4: Simplify right side
    348,274.80x = 108,425,853,834.48
  5. Step 5: Solve for x
    x = 108,425,853,834.48/348,274.80
  6. Step 6: Final answer
    x = 311,322.71

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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.