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Finding the Fourth Proportional to 2,870.80, 3,962.07 and 1,691.98

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Solution

The fourth proportional to 2,870.80, 3,962.07 and 1,691.98 is: 2,335.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,870.80 : 3,962.07 = 1,691.98 : x
  2. Step 2: Convert to fraction form
    2,870.80/3,962.07 = 1,691.98/x
  3. Step 3: Cross multiply
    2,870.80x = 3,962.07 × 1,691.98
  4. Step 4: Simplify right side
    2,870.80x = 6,703,743.20
  5. Step 5: Solve for x
    x = 6,703,743.20/2,870.80
  6. Step 6: Final answer
    x = 2,335.15

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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.