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Finding the Fourth Proportional to 956, 1,434.80 and 379.28

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Solution

The fourth proportional to 956, 1,434.80 and 379.28 is: 569.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    956 : 1,434.80 = 379.28 : x
  2. Step 2: Convert to fraction form
    956/1,434.80 = 379.28/x
  3. Step 3: Cross multiply
    956x = 1,434.80 × 379.28
  4. Step 4: Simplify right side
    956x = 544,190.94
  5. Step 5: Solve for x
    x = 544,190.94/956
  6. Step 6: Final answer
    x = 569.24

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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.