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Finding the Fourth Proportional to 266.00, 398.93 and 129.15

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Solution

The fourth proportional to 266.00, 398.93 and 129.15 is: 193.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.00 : 398.93 = 129.15 : x
  2. Step 2: Convert to fraction form
    266.00/398.93 = 129.15/x
  3. Step 3: Cross multiply
    266.00x = 398.93 × 129.15
  4. Step 4: Simplify right side
    266.00x = 51,521.16
  5. Step 5: Solve for x
    x = 51,521.16/266.00
  6. Step 6: Final answer
    x = 193.69

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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.