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Finding the Fourth Proportional to 844.89, 1,261.44 and 729.21

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Solution

The fourth proportional to 844.89, 1,261.44 and 729.21 is: 1,088.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.89 : 1,261.44 = 729.21 : x
  2. Step 2: Convert to fraction form
    844.89/1,261.44 = 729.21/x
  3. Step 3: Cross multiply
    844.89x = 1,261.44 × 729.21
  4. Step 4: Simplify right side
    844.89x = 919,854.66
  5. Step 5: Solve for x
    x = 919,854.66/844.89
  6. Step 6: Final answer
    x = 1,088.73

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1.5x scale

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.