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Finding the Fourth Proportional to 170.56, 235.28 and 151.20

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Solution

The fourth proportional to 170.56, 235.28 and 151.20 is: 208.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.56 : 235.28 = 151.20 : x
  2. Step 2: Convert to fraction form
    170.56/235.28 = 151.20/x
  3. Step 3: Cross multiply
    170.56x = 235.28 × 151.20
  4. Step 4: Simplify right side
    170.56x = 35,574.34
  5. Step 5: Solve for x
    x = 35,574.34/170.56
  6. Step 6: Final answer
    x = 208.57

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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.