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Finding the Fourth Proportional to 346.42, 478.06 and 271.82

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Solution

The fourth proportional to 346.42, 478.06 and 271.82 is: 375.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.42 : 478.06 = 271.82 : x
  2. Step 2: Convert to fraction form
    346.42/478.06 = 271.82/x
  3. Step 3: Cross multiply
    346.42x = 478.06 × 271.82
  4. Step 4: Simplify right side
    346.42x = 129,943.88
  5. Step 5: Solve for x
    x = 129,943.88/346.42
  6. Step 6: Final answer
    x = 375.11

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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.