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Finding the Fourth Proportional to 1,097.95, 1,513.36 and 779.04

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Solution

The fourth proportional to 1,097.95, 1,513.36 and 779.04 is: 1,073.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,097.95 : 1,513.36 = 779.04 : x
  2. Step 2: Convert to fraction form
    1,097.95/1,513.36 = 779.04/x
  3. Step 3: Cross multiply
    1,097.95x = 1,513.36 × 779.04
  4. Step 4: Simplify right side
    1,097.95x = 1,178,967.97
  5. Step 5: Solve for x
    x = 1,178,967.97/1,097.95
  6. Step 6: Final answer
    x = 1,073.79

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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.