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Finding the Fourth Proportional to 743.36, 1,025.75 and 411.75

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Solution

The fourth proportional to 743.36, 1,025.75 and 411.75 is: 568.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.36 : 1,025.75 = 411.75 : x
  2. Step 2: Convert to fraction form
    743.36/1,025.75 = 411.75/x
  3. Step 3: Cross multiply
    743.36x = 1,025.75 × 411.75
  4. Step 4: Simplify right side
    743.36x = 422,350.50
  5. Step 5: Solve for x
    x = 422,350.50/743.36
  6. Step 6: Final answer
    x = 568.17

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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.