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Finding the Fourth Proportional to 956.41, 1,434.58 and 379.28

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Solution

The fourth proportional to 956.41, 1,434.58 and 379.28 is: 568.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.41 : 1,434.58 = 379.28 : x
  2. Step 2: Convert to fraction form
    956.41/1,434.58 = 379.28/x
  3. Step 3: Cross multiply
    956.41x = 1,434.58 × 379.28
  4. Step 4: Simplify right side
    956.41x = 544,110.14
  5. Step 5: Solve for x
    x = 544,110.14/956.41
  6. Step 6: Final answer
    x = 568.91

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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.