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Finding the Fourth Proportional to 402.06, 554.08 and 291.34

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Solution

The fourth proportional to 402.06, 554.08 and 291.34 is: 401.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.06 : 554.08 = 291.34 : x
  2. Step 2: Convert to fraction form
    402.06/554.08 = 291.34/x
  3. Step 3: Cross multiply
    402.06x = 554.08 × 291.34
  4. Step 4: Simplify right side
    402.06x = 161,425.67
  5. Step 5: Solve for x
    x = 161,425.67/402.06
  6. Step 6: Final answer
    x = 401.50

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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.