Home / 1,515.62-2,271-1,272.62

Finding the Fourth Proportional to 1,515.62, 2,271 and 1,272.62

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Solution

The fourth proportional to 1,515.62, 2,271 and 1,272.62 is: 1,906.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.62 : 2,271 = 1,272.62 : x
  2. Step 2: Convert to fraction form
    1,515.62/2,271 = 1,272.62/x
  3. Step 3: Cross multiply
    1,515.62x = 2,271 × 1,272.62
  4. Step 4: Simplify right side
    1,515.62x = 2,890,125.70
  5. Step 5: Solve for x
    x = 2,890,125.70/1,515.62
  6. Step 6: Final answer
    x = 1,906.89

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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.