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Finding the Fourth Proportional to 256.91, 354.65 and 183.21

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Solution

The fourth proportional to 256.91, 354.65 and 183.21 is: 252.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.91 : 354.65 = 183.21 : x
  2. Step 2: Convert to fraction form
    256.91/354.65 = 183.21/x
  3. Step 3: Cross multiply
    256.91x = 354.65 × 183.21
  4. Step 4: Simplify right side
    256.91x = 64,975.18
  5. Step 5: Solve for x
    x = 64,975.18/256.91
  6. Step 6: Final answer
    x = 252.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.