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Finding the Fourth Proportional to 796.68, 1,097.18 and 642.24

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Solution

The fourth proportional to 796.68, 1,097.18 and 642.24 is: 884.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    796.68 : 1,097.18 = 642.24 : x
  2. Step 2: Convert to fraction form
    796.68/1,097.18 = 642.24/x
  3. Step 3: Cross multiply
    796.68x = 1,097.18 × 642.24
  4. Step 4: Simplify right side
    796.68x = 704,652.08
  5. Step 5: Solve for x
    x = 704,652.08/796.68
  6. Step 6: Final answer
    x = 884.49

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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.