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Finding the Fourth Proportional to 2,159.66, 3,242.10 and 1,429.88

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Solution

The fourth proportional to 2,159.66, 3,242.10 and 1,429.88 is: 2,146.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,159.66 : 3,242.10 = 1,429.88 : x
  2. Step 2: Convert to fraction form
    2,159.66/3,242.10 = 1,429.88/x
  3. Step 3: Cross multiply
    2,159.66x = 3,242.10 × 1,429.88
  4. Step 4: Simplify right side
    2,159.66x = 4,635,813.95
  5. Step 5: Solve for x
    x = 4,635,813.95/2,159.66
  6. Step 6: Final answer
    x = 2,146.55

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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.