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Finding the Fourth Proportional to 341.80, 471.90 and 308.59

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Solution

The fourth proportional to 341.80, 471.90 and 308.59 is: 426.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    341.80 : 471.90 = 308.59 : x
  2. Step 2: Convert to fraction form
    341.80/471.90 = 308.59/x
  3. Step 3: Cross multiply
    341.80x = 471.90 × 308.59
  4. Step 4: Simplify right side
    341.80x = 145,623.62
  5. Step 5: Solve for x
    x = 145,623.62/341.80
  6. Step 6: Final answer
    x = 426.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.