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Finding the Fourth Proportional to 887.80, 1,224.84 and 551.68

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Solution

The fourth proportional to 887.80, 1,224.84 and 551.68 is: 761.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.80 : 1,224.84 = 551.68 : x
  2. Step 2: Convert to fraction form
    887.80/1,224.84 = 551.68/x
  3. Step 3: Cross multiply
    887.80x = 1,224.84 × 551.68
  4. Step 4: Simplify right side
    887.80x = 675,719.73
  5. Step 5: Solve for x
    x = 675,719.73/887.80
  6. Step 6: Final answer
    x = 761.12

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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.