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Finding the Fourth Proportional to 256.36, 383.96 and 146.42

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Solution

The fourth proportional to 256.36, 383.96 and 146.42 is: 219.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.36 : 383.96 = 146.42 : x
  2. Step 2: Convert to fraction form
    256.36/383.96 = 146.42/x
  3. Step 3: Cross multiply
    256.36x = 383.96 × 146.42
  4. Step 4: Simplify right side
    256.36x = 56,219.42
  5. Step 5: Solve for x
    x = 56,219.42/256.36
  6. Step 6: Final answer
    x = 219.30

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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.