Home / 2,690.48-3,712.82-1,511.76

Finding the Fourth Proportional to 2,690.48, 3,712.82 and 1,511.76

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Solution

The fourth proportional to 2,690.48, 3,712.82 and 1,511.76 is: 2,086.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,690.48 : 3,712.82 = 1,511.76 : x
  2. Step 2: Convert to fraction form
    2,690.48/3,712.82 = 1,511.76/x
  3. Step 3: Cross multiply
    2,690.48x = 3,712.82 × 1,511.76
  4. Step 4: Simplify right side
    2,690.48x = 5,612,892.76
  5. Step 5: Solve for x
    x = 5,612,892.76/2,690.48
  6. Step 6: Final answer
    x = 2,086.20

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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.