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Finding the Fourth Proportional to 1,460.97, 2,191.40 and 811.29

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Solution

The fourth proportional to 1,460.97, 2,191.40 and 811.29 is: 1,216.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,460.97 : 2,191.40 = 811.29 : x
  2. Step 2: Convert to fraction form
    1,460.97/2,191.40 = 811.29/x
  3. Step 3: Cross multiply
    1,460.97x = 2,191.40 × 811.29
  4. Step 4: Simplify right side
    1,460.97x = 1,777,856.85
  5. Step 5: Solve for x
    x = 1,777,856.85/1,460.97
  6. Step 6: Final answer
    x = 1,216.90

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1.5x scale

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.