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Finding the Fourth Proportional to 256.52, 355.61 and 242.66

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Solution

The fourth proportional to 256.52, 355.61 and 242.66 is: 336.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.52 : 355.61 = 242.66 : x
  2. Step 2: Convert to fraction form
    256.52/355.61 = 242.66/x
  3. Step 3: Cross multiply
    256.52x = 355.61 × 242.66
  4. Step 4: Simplify right side
    256.52x = 86,292.32
  5. Step 5: Solve for x
    x = 86,292.32/256.52
  6. Step 6: Final answer
    x = 336.40

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.