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Finding the Fourth Proportional to 170.48, 256.64 and 155.60

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Solution

The fourth proportional to 170.48, 256.64 and 155.60 is: 234.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.48 : 256.64 = 155.60 : x
  2. Step 2: Convert to fraction form
    170.48/256.64 = 155.60/x
  3. Step 3: Cross multiply
    170.48x = 256.64 × 155.60
  4. Step 4: Simplify right side
    170.48x = 39,933.18
  5. Step 5: Solve for x
    x = 39,933.18/170.48
  6. Step 6: Final answer
    x = 234.24

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.