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Finding the Fourth Proportional to 231.03, 346.59 and 128.16

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Solution

The fourth proportional to 231.03, 346.59 and 128.16 is: 192.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.03 : 346.59 = 128.16 : x
  2. Step 2: Convert to fraction form
    231.03/346.59 = 128.16/x
  3. Step 3: Cross multiply
    231.03x = 346.59 × 128.16
  4. Step 4: Simplify right side
    231.03x = 44,418.97
  5. Step 5: Solve for x
    x = 44,418.97/231.03
  6. Step 6: Final answer
    x = 192.26

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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.