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Finding the Fourth Proportional to 1,097.28, 1,644.86 and 403.76

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Solution

The fourth proportional to 1,097.28, 1,644.86 and 403.76 is: 605.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,097.28 : 1,644.86 = 403.76 : x
  2. Step 2: Convert to fraction form
    1,097.28/1,644.86 = 403.76/x
  3. Step 3: Cross multiply
    1,097.28x = 1,644.86 × 403.76
  4. Step 4: Simplify right side
    1,097.28x = 664,128.67
  5. Step 5: Solve for x
    x = 664,128.67/1,097.28
  6. Step 6: Final answer
    x = 605.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.