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Finding the Fourth Proportional to 1,957.40, 2,701.14 and 1,171.40

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Solution

The fourth proportional to 1,957.40, 2,701.14 and 1,171.40 is: 1,616.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,957.40 : 2,701.14 = 1,171.40 : x
  2. Step 2: Convert to fraction form
    1,957.40/2,701.14 = 1,171.40/x
  3. Step 3: Cross multiply
    1,957.40x = 2,701.14 × 1,171.40
  4. Step 4: Simplify right side
    1,957.40x = 3,164,115.40
  5. Step 5: Solve for x
    x = 3,164,115.40/1,957.40
  6. Step 6: Final answer
    x = 1,616.49

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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.