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Finding the Fourth Proportional to 1,982, 2,735.16 and 1,154

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Solution

The fourth proportional to 1,982, 2,735.16 and 1,154 is: 1,592.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,982 : 2,735.16 = 1,154 : x
  2. Step 2: Convert to fraction form
    1,982/2,735.16 = 1,154/x
  3. Step 3: Cross multiply
    1,982x = 2,735.16 × 1,154
  4. Step 4: Simplify right side
    1,982x = 3,156,374.64
  5. Step 5: Solve for x
    x = 3,156,374.64/1,982
  6. Step 6: Final answer
    x = 1,592.52

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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.