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Finding the Fourth Proportional to 2,689.96, 3,712.34 and 1,511.08

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Solution

The fourth proportional to 2,689.96, 3,712.34 and 1,511.08 is: 2,085.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,689.96 : 3,712.34 = 1,511.08 : x
  2. Step 2: Convert to fraction form
    2,689.96/3,712.34 = 1,511.08/x
  3. Step 3: Cross multiply
    2,689.96x = 3,712.34 × 1,511.08
  4. Step 4: Simplify right side
    2,689.96x = 5,609,642.73
  5. Step 5: Solve for x
    x = 5,609,642.73/2,689.96
  6. Step 6: Final answer
    x = 2,085.40

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1.5x scale

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.