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Finding the Fourth Proportional to 805.10, 1,208.06 and 372.56

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Solution

The fourth proportional to 805.10, 1,208.06 and 372.56 is: 559.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    805.10 : 1,208.06 = 372.56 : x
  2. Step 2: Convert to fraction form
    805.10/1,208.06 = 372.56/x
  3. Step 3: Cross multiply
    805.10x = 1,208.06 × 372.56
  4. Step 4: Simplify right side
    805.10x = 450,078.79
  5. Step 5: Solve for x
    x = 450,078.79/805.10
  6. Step 6: Final answer
    x = 559.03

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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.