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Finding the Fourth Proportional to 866.42, 1,195.31 and 551.60

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Solution

The fourth proportional to 866.42, 1,195.31 and 551.60 is: 760.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    866.42 : 1,195.31 = 551.60 : x
  2. Step 2: Convert to fraction form
    866.42/1,195.31 = 551.60/x
  3. Step 3: Cross multiply
    866.42x = 1,195.31 × 551.60
  4. Step 4: Simplify right side
    866.42x = 659,328.40
  5. Step 5: Solve for x
    x = 659,328.40/866.42
  6. Step 6: Final answer
    x = 760.98

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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.