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Finding the Fourth Proportional to 233.16, 349.77 and 86.91

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Solution

The fourth proportional to 233.16, 349.77 and 86.91 is: 130.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    233.16 : 349.77 = 86.91 : x
  2. Step 2: Convert to fraction form
    233.16/349.77 = 86.91/x
  3. Step 3: Cross multiply
    233.16x = 349.77 × 86.91
  4. Step 4: Simplify right side
    233.16x = 30,398.51
  5. Step 5: Solve for x
    x = 30,398.51/233.16
  6. Step 6: Final answer
    x = 130.38

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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.