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Finding the Fourth Proportional to 2,578.68, 3,559.68 and 1,531.08

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Solution

The fourth proportional to 2,578.68, 3,559.68 and 1,531.08 is: 2,113.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,578.68 : 3,559.68 = 1,531.08 : x
  2. Step 2: Convert to fraction form
    2,578.68/3,559.68 = 1,531.08/x
  3. Step 3: Cross multiply
    2,578.68x = 3,559.68 × 1,531.08
  4. Step 4: Simplify right side
    2,578.68x = 5,450,154.85
  5. Step 5: Solve for x
    x = 5,450,154.85/2,578.68
  6. Step 6: Final answer
    x = 2,113.54

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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.