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Finding the Fourth Proportional to 276.28, 412.40 and 256.26

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Solution

The fourth proportional to 276.28, 412.40 and 256.26 is: 382.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.28 : 412.40 = 256.26 : x
  2. Step 2: Convert to fraction form
    276.28/412.40 = 256.26/x
  3. Step 3: Cross multiply
    276.28x = 412.40 × 256.26
  4. Step 4: Simplify right side
    276.28x = 105,681.62
  5. Step 5: Solve for x
    x = 105,681.62/276.28
  6. Step 6: Final answer
    x = 382.52

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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.