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Finding the Fourth Proportional to 805.13, 1,207.70 and 372.23

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Solution

The fourth proportional to 805.13, 1,207.70 and 372.23 is: 558.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    805.13 : 1,207.70 = 372.23 : x
  2. Step 2: Convert to fraction form
    805.13/1,207.70 = 372.23/x
  3. Step 3: Cross multiply
    805.13x = 1,207.70 × 372.23
  4. Step 4: Simplify right side
    805.13x = 449,544.72
  5. Step 5: Solve for x
    x = 449,544.72/805.13
  6. Step 6: Final answer
    x = 558.35

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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.