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Finding the Fourth Proportional to 1,809.13, 2,713.96 and 655.15

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Solution

The fourth proportional to 1,809.13, 2,713.96 and 655.15 is: 982.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,809.13 : 2,713.96 = 655.15 : x
  2. Step 2: Convert to fraction form
    1,809.13/2,713.96 = 655.15/x
  3. Step 3: Cross multiply
    1,809.13x = 2,713.96 × 655.15
  4. Step 4: Simplify right side
    1,809.13x = 1,778,037.32
  5. Step 5: Solve for x
    x = 1,778,037.32/1,809.13
  6. Step 6: Final answer
    x = 982.82

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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.