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Finding the Fourth Proportional to 348,272.80, 521,372.40 and 207,959.20

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Solution

The fourth proportional to 348,272.80, 521,372.40 and 207,959.20 is: 311,319.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,272.80 : 521,372.40 = 207,959.20 : x
  2. Step 2: Convert to fraction form
    348,272.80/521,372.40 = 207,959.20/x
  3. Step 3: Cross multiply
    348,272.80x = 521,372.40 × 207,959.20
  4. Step 4: Simplify right side
    348,272.80x = 108,424,187,206.08
  5. Step 5: Solve for x
    x = 108,424,187,206.08/348,272.80
  6. Step 6: Final answer
    x = 311,319.71

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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.