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Finding the Fourth Proportional to 675.64, 932.61 and 395.99

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Solution

The fourth proportional to 675.64, 932.61 and 395.99 is: 546.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.64 : 932.61 = 395.99 : x
  2. Step 2: Convert to fraction form
    675.64/932.61 = 395.99/x
  3. Step 3: Cross multiply
    675.64x = 932.61 × 395.99
  4. Step 4: Simplify right side
    675.64x = 369,304.55
  5. Step 5: Solve for x
    x = 369,304.55/675.64
  6. Step 6: Final answer
    x = 546.60

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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.