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Finding the Fourth Proportional to 932.66, 1,399.30 and 445.75

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Solution

The fourth proportional to 932.66, 1,399.30 and 445.75 is: 668.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.66 : 1,399.30 = 445.75 : x
  2. Step 2: Convert to fraction form
    932.66/1,399.30 = 445.75/x
  3. Step 3: Cross multiply
    932.66x = 1,399.30 × 445.75
  4. Step 4: Simplify right side
    932.66x = 623,736.30
  5. Step 5: Solve for x
    x = 623,736.30/932.66
  6. Step 6: Final answer
    x = 668.77

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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.