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Finding the Fourth Proportional to 2,352.89, 3,530.96 and 813.89

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Solution

The fourth proportional to 2,352.89, 3,530.96 and 813.89 is: 1,221.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,352.89 : 3,530.96 = 813.89 : x
  2. Step 2: Convert to fraction form
    2,352.89/3,530.96 = 813.89/x
  3. Step 3: Cross multiply
    2,352.89x = 3,530.96 × 813.89
  4. Step 4: Simplify right side
    2,352.89x = 2,873,813.03
  5. Step 5: Solve for x
    x = 2,873,813.03/2,352.89
  6. Step 6: Final answer
    x = 1,221.40

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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.