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Finding the Fourth Proportional to 805.89, 1,209.42 and 292.89

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Solution

The fourth proportional to 805.89, 1,209.42 and 292.89 is: 439.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    805.89 : 1,209.42 = 292.89 : x
  2. Step 2: Convert to fraction form
    805.89/1,209.42 = 292.89/x
  3. Step 3: Cross multiply
    805.89x = 1,209.42 × 292.89
  4. Step 4: Simplify right side
    805.89x = 354,227.02
  5. Step 5: Solve for x
    x = 354,227.02/805.89
  6. Step 6: Final answer
    x = 439.55

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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.