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Finding the Fourth Proportional to 1,097.68, 1,515.36 and 803.56

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Solution

The fourth proportional to 1,097.68, 1,515.36 and 803.56 is: 1,109.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,097.68 : 1,515.36 = 803.56 : x
  2. Step 2: Convert to fraction form
    1,097.68/1,515.36 = 803.56/x
  3. Step 3: Cross multiply
    1,097.68x = 1,515.36 × 803.56
  4. Step 4: Simplify right side
    1,097.68x = 1,217,682.68
  5. Step 5: Solve for x
    x = 1,217,682.68/1,097.68
  6. Step 6: Final answer
    x = 1,109.32

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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.