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Finding the Fourth Proportional to 1,305.39, 1,958.67 and 575.19

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Solution

The fourth proportional to 1,305.39, 1,958.67 and 575.19 is: 863.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,305.39 : 1,958.67 = 575.19 : x
  2. Step 2: Convert to fraction form
    1,305.39/1,958.67 = 575.19/x
  3. Step 3: Cross multiply
    1,305.39x = 1,958.67 × 575.19
  4. Step 4: Simplify right side
    1,305.39x = 1,126,607.40
  5. Step 5: Solve for x
    x = 1,126,607.40/1,305.39
  6. Step 6: Final answer
    x = 863.04

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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.