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Finding the Fourth Proportional to 949.82, 1,310.98 and 551.39

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Solution

The fourth proportional to 949.82, 1,310.98 and 551.39 is: 761.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.82 : 1,310.98 = 551.39 : x
  2. Step 2: Convert to fraction form
    949.82/1,310.98 = 551.39/x
  3. Step 3: Cross multiply
    949.82x = 1,310.98 × 551.39
  4. Step 4: Simplify right side
    949.82x = 722,863.16
  5. Step 5: Solve for x
    x = 722,863.16/949.82
  6. Step 6: Final answer
    x = 761.06

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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.