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Finding the Fourth Proportional to 170.30, 235.42 and 155.11

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Solution

The fourth proportional to 170.30, 235.42 and 155.11 is: 214.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.30 : 235.42 = 155.11 : x
  2. Step 2: Convert to fraction form
    170.30/235.42 = 155.11/x
  3. Step 3: Cross multiply
    170.30x = 235.42 × 155.11
  4. Step 4: Simplify right side
    170.30x = 36,515.22
  5. Step 5: Solve for x
    x = 36,515.22/170.30
  6. Step 6: Final answer
    x = 214.42

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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.