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Finding the Fourth Proportional to 1,695.90, 2,538.18 and 965.28

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Solution

The fourth proportional to 1,695.90, 2,538.18 and 965.28 is: 1,444.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,695.90 : 2,538.18 = 965.28 : x
  2. Step 2: Convert to fraction form
    1,695.90/2,538.18 = 965.28/x
  3. Step 3: Cross multiply
    1,695.90x = 2,538.18 × 965.28
  4. Step 4: Simplify right side
    1,695.90x = 2,450,054.39
  5. Step 5: Solve for x
    x = 2,450,054.39/1,695.90
  6. Step 6: Final answer
    x = 1,444.69

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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.