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Finding the Fourth Proportional to 1,097.78, 1,515.26 and 704.80

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Solution

The fourth proportional to 1,097.78, 1,515.26 and 704.80 is: 972.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,097.78 : 1,515.26 = 704.80 : x
  2. Step 2: Convert to fraction form
    1,097.78/1,515.26 = 704.80/x
  3. Step 3: Cross multiply
    1,097.78x = 1,515.26 × 704.80
  4. Step 4: Simplify right side
    1,097.78x = 1,067,955.25
  5. Step 5: Solve for x
    x = 1,067,955.25/1,097.78
  6. Step 6: Final answer
    x = 972.83

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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.