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Finding the Fourth Proportional to 500.28, 750.12 and 256.68

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Solution

The fourth proportional to 500.28, 750.12 and 256.68 is: 384.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.28 : 750.12 = 256.68 : x
  2. Step 2: Convert to fraction form
    500.28/750.12 = 256.68/x
  3. Step 3: Cross multiply
    500.28x = 750.12 × 256.68
  4. Step 4: Simplify right side
    500.28x = 192,540.80
  5. Step 5: Solve for x
    x = 192,540.80/500.28
  6. Step 6: Final answer
    x = 384.87

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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.