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Finding the Fourth Proportional to 1,217.36, 1,825.68 and 395.84

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Solution

The fourth proportional to 1,217.36, 1,825.68 and 395.84 is: 593.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217.36 : 1,825.68 = 395.84 : x
  2. Step 2: Convert to fraction form
    1,217.36/1,825.68 = 395.84/x
  3. Step 3: Cross multiply
    1,217.36x = 1,825.68 × 395.84
  4. Step 4: Simplify right side
    1,217.36x = 722,677.17
  5. Step 5: Solve for x
    x = 722,677.17/1,217.36
  6. Step 6: Final answer
    x = 593.64

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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.