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Finding the Fourth Proportional to 866.79, 1,196.46 and 551.94

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Solution

The fourth proportional to 866.79, 1,196.46 and 551.94 is: 761.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    866.79 : 1,196.46 = 551.94 : x
  2. Step 2: Convert to fraction form
    866.79/1,196.46 = 551.94/x
  3. Step 3: Cross multiply
    866.79x = 1,196.46 × 551.94
  4. Step 4: Simplify right side
    866.79x = 660,374.13
  5. Step 5: Solve for x
    x = 660,374.13/866.79
  6. Step 6: Final answer
    x = 761.86

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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.