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Finding the Fourth Proportional to 1,721.30, 2,375.18 and 965.12

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Solution

The fourth proportional to 1,721.30, 2,375.18 and 965.12 is: 1,331.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.30 : 2,375.18 = 965.12 : x
  2. Step 2: Convert to fraction form
    1,721.30/2,375.18 = 965.12/x
  3. Step 3: Cross multiply
    1,721.30x = 2,375.18 × 965.12
  4. Step 4: Simplify right side
    1,721.30x = 2,292,322.96
  5. Step 5: Solve for x
    x = 2,292,322.96/1,721.30
  6. Step 6: Final answer
    x = 1,331.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.