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Finding the Fourth Proportional to 949.42, 1,310.11 and 551.15

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Solution

The fourth proportional to 949.42, 1,310.11 and 551.15 is: 760.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.42 : 1,310.11 = 551.15 : x
  2. Step 2: Convert to fraction form
    949.42/1,310.11 = 551.15/x
  3. Step 3: Cross multiply
    949.42x = 1,310.11 × 551.15
  4. Step 4: Simplify right side
    949.42x = 722,064.37
  5. Step 5: Solve for x
    x = 722,064.37/949.42
  6. Step 6: Final answer
    x = 760.54

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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.