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Finding the Fourth Proportional to 256.42, 384.81 and 183.28

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Solution

The fourth proportional to 256.42, 384.81 and 183.28 is: 275.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.42 : 384.81 = 183.28 : x
  2. Step 2: Convert to fraction form
    256.42/384.81 = 183.28/x
  3. Step 3: Cross multiply
    256.42x = 384.81 × 183.28
  4. Step 4: Simplify right side
    256.42x = 70,527.98
  5. Step 5: Solve for x
    x = 70,527.98/256.42
  6. Step 6: Final answer
    x = 275.05

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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.