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Finding the Fourth Proportional to 2,654.40, 3,982.40 and 1,886.40

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Solution

The fourth proportional to 2,654.40, 3,982.40 and 1,886.40 is: 2,830.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,654.40 : 3,982.40 = 1,886.40 : x
  2. Step 2: Convert to fraction form
    2,654.40/3,982.40 = 1,886.40/x
  3. Step 3: Cross multiply
    2,654.40x = 3,982.40 × 1,886.40
  4. Step 4: Simplify right side
    2,654.40x = 7,512,399.36
  5. Step 5: Solve for x
    x = 7,512,399.36/2,654.40
  6. Step 6: Final answer
    x = 2,830.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.