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Finding the Fourth Proportional to 844.21, 1,266.36 and 479.26

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Solution

The fourth proportional to 844.21, 1,266.36 and 479.26 is: 718.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.21 : 1,266.36 = 479.26 : x
  2. Step 2: Convert to fraction form
    844.21/1,266.36 = 479.26/x
  3. Step 3: Cross multiply
    844.21x = 1,266.36 × 479.26
  4. Step 4: Simplify right side
    844.21x = 606,915.69
  5. Step 5: Solve for x
    x = 606,915.69/844.21
  6. Step 6: Final answer
    x = 718.92

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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.