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Finding the Fourth Proportional to 844.16, 1,166.30 and 721.12

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Solution

The fourth proportional to 844.16, 1,166.30 and 721.12 is: 996.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.16 : 1,166.30 = 721.12 : x
  2. Step 2: Convert to fraction form
    844.16/1,166.30 = 721.12/x
  3. Step 3: Cross multiply
    844.16x = 1,166.30 × 721.12
  4. Step 4: Simplify right side
    844.16x = 841,042.26
  5. Step 5: Solve for x
    x = 841,042.26/844.16
  6. Step 6: Final answer
    x = 996.31

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1.5x scale

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.