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Finding the Fourth Proportional to 956.28, 1,434.39 and 272.28

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Solution

The fourth proportional to 956.28, 1,434.39 and 272.28 is: 408.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.28 : 1,434.39 = 272.28 : x
  2. Step 2: Convert to fraction form
    956.28/1,434.39 = 272.28/x
  3. Step 3: Cross multiply
    956.28x = 1,434.39 × 272.28
  4. Step 4: Simplify right side
    956.28x = 390,555.71
  5. Step 5: Solve for x
    x = 390,555.71/956.28
  6. Step 6: Final answer
    x = 408.41

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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.