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Finding the Fourth Proportional to 675.64, 932.39 and 380.91

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Solution

The fourth proportional to 675.64, 932.39 and 380.91 is: 525.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.64 : 932.39 = 380.91 : x
  2. Step 2: Convert to fraction form
    675.64/932.39 = 380.91/x
  3. Step 3: Cross multiply
    675.64x = 932.39 × 380.91
  4. Step 4: Simplify right side
    675.64x = 355,158.05
  5. Step 5: Solve for x
    x = 355,158.05/675.64
  6. Step 6: Final answer
    x = 525.66

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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.