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Finding the Fourth Proportional to 2,142.95, 2,957.22 and 1,198.71

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Solution

The fourth proportional to 2,142.95, 2,957.22 and 1,198.71 is: 1,654.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,142.95 : 2,957.22 = 1,198.71 : x
  2. Step 2: Convert to fraction form
    2,142.95/2,957.22 = 1,198.71/x
  3. Step 3: Cross multiply
    2,142.95x = 2,957.22 × 1,198.71
  4. Step 4: Simplify right side
    2,142.95x = 3,544,849.19
  5. Step 5: Solve for x
    x = 3,544,849.19/2,142.95
  6. Step 6: Final answer
    x = 1,654.20

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1.5x scale

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.