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Finding the Fourth Proportional to 844.32, 1,264.21 and 551.21

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Solution

The fourth proportional to 844.32, 1,264.21 and 551.21 is: 825.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.32 : 1,264.21 = 551.21 : x
  2. Step 2: Convert to fraction form
    844.32/1,264.21 = 551.21/x
  3. Step 3: Cross multiply
    844.32x = 1,264.21 × 551.21
  4. Step 4: Simplify right side
    844.32x = 696,837.50
  5. Step 5: Solve for x
    x = 696,837.50/844.32
  6. Step 6: Final answer
    x = 825.32

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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.