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Finding the Fourth Proportional to 1,084.80, 1,497.76 and 712.42

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Solution

The fourth proportional to 1,084.80, 1,497.76 and 712.42 is: 983.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,084.80 : 1,497.76 = 712.42 : x
  2. Step 2: Convert to fraction form
    1,084.80/1,497.76 = 712.42/x
  3. Step 3: Cross multiply
    1,084.80x = 1,497.76 × 712.42
  4. Step 4: Simplify right side
    1,084.80x = 1,067,034.18
  5. Step 5: Solve for x
    x = 1,067,034.18/1,084.80
  6. Step 6: Final answer
    x = 983.62

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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.