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Finding the Fourth Proportional to 4,948.79, 7,412.40 and 2,479.31

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Solution

The fourth proportional to 4,948.79, 7,412.40 and 2,479.31 is: 3,713.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,948.79 : 7,412.40 = 2,479.31 : x
  2. Step 2: Convert to fraction form
    4,948.79/7,412.40 = 2,479.31/x
  3. Step 3: Cross multiply
    4,948.79x = 7,412.40 × 2,479.31
  4. Step 4: Simplify right side
    4,948.79x = 18,377,600.38
  5. Step 5: Solve for x
    x = 18,377,600.38/4,948.79
  6. Step 6: Final answer
    x = 3,713.56

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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.