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Finding the Fourth Proportional to 331.85, 497.01 and 258.13

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Solution

The fourth proportional to 331.85, 497.01 and 258.13 is: 386.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.85 : 497.01 = 258.13 : x
  2. Step 2: Convert to fraction form
    331.85/497.01 = 258.13/x
  3. Step 3: Cross multiply
    331.85x = 497.01 × 258.13
  4. Step 4: Simplify right side
    331.85x = 128,294.78
  5. Step 5: Solve for x
    x = 128,294.78/331.85
  6. Step 6: Final answer
    x = 386.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.