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Finding the Fourth Proportional to 341.62, 471.29 and 318.40

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Solution

The fourth proportional to 341.62, 471.29 and 318.40 is: 439.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    341.62 : 471.29 = 318.40 : x
  2. Step 2: Convert to fraction form
    341.62/471.29 = 318.40/x
  3. Step 3: Cross multiply
    341.62x = 471.29 × 318.40
  4. Step 4: Simplify right side
    341.62x = 150,055.97
  5. Step 5: Solve for x
    x = 150,055.97/341.62
  6. Step 6: Final answer
    x = 439.25

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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.