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Finding the Fourth Proportional to 932.12, 1,396.05 and 445.52

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Solution

The fourth proportional to 932.12, 1,396.05 and 445.52 is: 667.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.12 : 1,396.05 = 445.52 : x
  2. Step 2: Convert to fraction form
    932.12/1,396.05 = 445.52/x
  3. Step 3: Cross multiply
    932.12x = 1,396.05 × 445.52
  4. Step 4: Simplify right side
    932.12x = 621,968.20
  5. Step 5: Solve for x
    x = 621,968.20/932.12
  6. Step 6: Final answer
    x = 667.26

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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.