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Finding the Fourth Proportional to 688.89, 1,032.50 and 323.19

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Solution

The fourth proportional to 688.89, 1,032.50 and 323.19 is: 484.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.89 : 1,032.50 = 323.19 : x
  2. Step 2: Convert to fraction form
    688.89/1,032.50 = 323.19/x
  3. Step 3: Cross multiply
    688.89x = 1,032.50 × 323.19
  4. Step 4: Simplify right side
    688.89x = 333,692.06
  5. Step 5: Solve for x
    x = 333,692.06/688.89
  6. Step 6: Final answer
    x = 484.39

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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.