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Finding the Fourth Proportional to 265.64, 395.85 and 256.93

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Solution

The fourth proportional to 265.64, 395.85 and 256.93 is: 382.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.64 : 395.85 = 256.93 : x
  2. Step 2: Convert to fraction form
    265.64/395.85 = 256.93/x
  3. Step 3: Cross multiply
    265.64x = 395.85 × 256.93
  4. Step 4: Simplify right side
    265.64x = 101,705.71
  5. Step 5: Solve for x
    x = 101,705.71/265.64
  6. Step 6: Final answer
    x = 382.88

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.