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Finding the Fourth Proportional to 341.21, 471.02 and 257.22

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Solution

The fourth proportional to 341.21, 471.02 and 257.22 is: 355.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    341.21 : 471.02 = 257.22 : x
  2. Step 2: Convert to fraction form
    341.21/471.02 = 257.22/x
  3. Step 3: Cross multiply
    341.21x = 471.02 × 257.22
  4. Step 4: Simplify right side
    341.21x = 121,155.61
  5. Step 5: Solve for x
    x = 121,155.61/341.21
  6. Step 6: Final answer
    x = 355.08

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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.