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Finding the Fourth Proportional to 342.16, 512.88 and 159.40

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Solution

The fourth proportional to 342.16, 512.88 and 159.40 is: 238.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.16 : 512.88 = 159.40 : x
  2. Step 2: Convert to fraction form
    342.16/512.88 = 159.40/x
  3. Step 3: Cross multiply
    342.16x = 512.88 × 159.40
  4. Step 4: Simplify right side
    342.16x = 81,752.28
  5. Step 5: Solve for x
    x = 81,752.28/342.16
  6. Step 6: Final answer
    x = 238.93

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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.