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Finding the Fourth Proportional to 5,281.48, 7,918.62 and 2,679.40

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Solution

The fourth proportional to 5,281.48, 7,918.62 and 2,679.40 is: 4,017.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,281.48 : 7,918.62 = 2,679.40 : x
  2. Step 2: Convert to fraction form
    5,281.48/7,918.62 = 2,679.40/x
  3. Step 3: Cross multiply
    5,281.48x = 7,918.62 × 2,679.40
  4. Step 4: Simplify right side
    5,281.48x = 21,217,150.43
  5. Step 5: Solve for x
    x = 21,217,150.43/5,281.48
  6. Step 6: Final answer
    x = 4,017.27

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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.