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Finding the Fourth Proportional to 256.02, 385.92 and 242.76

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Solution

The fourth proportional to 256.02, 385.92 and 242.76 is: 365.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.02 : 385.92 = 242.76 : x
  2. Step 2: Convert to fraction form
    256.02/385.92 = 242.76/x
  3. Step 3: Cross multiply
    256.02x = 385.92 × 242.76
  4. Step 4: Simplify right side
    256.02x = 93,685.94
  5. Step 5: Solve for x
    x = 93,685.94/256.02
  6. Step 6: Final answer
    x = 365.93

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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.