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Finding the Fourth Proportional to 1,817.12, 2,507.82 and 1,108.82

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Solution

The fourth proportional to 1,817.12, 2,507.82 and 1,108.82 is: 1,530.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,817.12 : 2,507.82 = 1,108.82 : x
  2. Step 2: Convert to fraction form
    1,817.12/2,507.82 = 1,108.82/x
  3. Step 3: Cross multiply
    1,817.12x = 2,507.82 × 1,108.82
  4. Step 4: Simplify right side
    1,817.12x = 2,780,720.97
  5. Step 5: Solve for x
    x = 2,780,720.97/1,817.12
  6. Step 6: Final answer
    x = 1,530.29

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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.