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Finding the Fourth Proportional to 2,690.47, 3,713 and 1,511.45

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Solution

The fourth proportional to 2,690.47, 3,713 and 1,511.45 is: 2,085.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,690.47 : 3,713 = 1,511.45 : x
  2. Step 2: Convert to fraction form
    2,690.47/3,713 = 1,511.45/x
  3. Step 3: Cross multiply
    2,690.47x = 3,713 × 1,511.45
  4. Step 4: Simplify right side
    2,690.47x = 5,612,013.85
  5. Step 5: Solve for x
    x = 5,612,013.85/2,690.47
  6. Step 6: Final answer
    x = 2,085.89

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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.