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Finding the Fourth Proportional to 806.61, 1,209.18 and 293.49

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Solution

The fourth proportional to 806.61, 1,209.18 and 293.49 is: 439.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    806.61 : 1,209.18 = 293.49 : x
  2. Step 2: Convert to fraction form
    806.61/1,209.18 = 293.49/x
  3. Step 3: Cross multiply
    806.61x = 1,209.18 × 293.49
  4. Step 4: Simplify right side
    806.61x = 354,882.24
  5. Step 5: Solve for x
    x = 354,882.24/806.61
  6. Step 6: Final answer
    x = 439.97

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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.