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Finding the Fourth Proportional to 690.63, 952.97 and 395.84

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Solution

The fourth proportional to 690.63, 952.97 and 395.84 is: 546.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.63 : 952.97 = 395.84 : x
  2. Step 2: Convert to fraction form
    690.63/952.97 = 395.84/x
  3. Step 3: Cross multiply
    690.63x = 952.97 × 395.84
  4. Step 4: Simplify right side
    690.63x = 377,216.90
  5. Step 5: Solve for x
    x = 377,216.90/690.63
  6. Step 6: Final answer
    x = 546.19

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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.