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Finding the Fourth Proportional to 996.91, 1,485.19 and 934.03

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Solution

The fourth proportional to 996.91, 1,485.19 and 934.03 is: 1,391.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    996.91 : 1,485.19 = 934.03 : x
  2. Step 2: Convert to fraction form
    996.91/1,485.19 = 934.03/x
  3. Step 3: Cross multiply
    996.91x = 1,485.19 × 934.03
  4. Step 4: Simplify right side
    996.91x = 1,387,209.79
  5. Step 5: Solve for x
    x = 1,387,209.79/996.91
  6. Step 6: Final answer
    x = 1,391.51

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.