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Finding the Fourth Proportional to 690.22, 952.55 and 379.72

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Solution

The fourth proportional to 690.22, 952.55 and 379.72 is: 524.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.22 : 952.55 = 379.72 : x
  2. Step 2: Convert to fraction form
    690.22/952.55 = 379.72/x
  3. Step 3: Cross multiply
    690.22x = 952.55 × 379.72
  4. Step 4: Simplify right side
    690.22x = 361,702.29
  5. Step 5: Solve for x
    x = 361,702.29/690.22
  6. Step 6: Final answer
    x = 524.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.