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Finding the Fourth Proportional to 2,892.32, 3,988.74 and 1,948.88

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Solution

The fourth proportional to 2,892.32, 3,988.74 and 1,948.88 is: 2,687.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,892.32 : 3,988.74 = 1,948.88 : x
  2. Step 2: Convert to fraction form
    2,892.32/3,988.74 = 1,948.88/x
  3. Step 3: Cross multiply
    2,892.32x = 3,988.74 × 1,948.88
  4. Step 4: Simplify right side
    2,892.32x = 7,773,575.61
  5. Step 5: Solve for x
    x = 7,773,575.61/2,892.32
  6. Step 6: Final answer
    x = 2,687.66

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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.