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Finding the Fourth Proportional to 401.86, 554.97 and 346.29

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Solution

The fourth proportional to 401.86, 554.97 and 346.29 is: 478.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.86 : 554.97 = 346.29 : x
  2. Step 2: Convert to fraction form
    401.86/554.97 = 346.29/x
  3. Step 3: Cross multiply
    401.86x = 554.97 × 346.29
  4. Step 4: Simplify right side
    401.86x = 192,177.79
  5. Step 5: Solve for x
    x = 192,177.79/401.86
  6. Step 6: Final answer
    x = 478.22

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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.