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Finding the Fourth Proportional to 534.39, 800.75 and 412.95

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Solution

The fourth proportional to 534.39, 800.75 and 412.95 is: 618.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    534.39 : 800.75 = 412.95 : x
  2. Step 2: Convert to fraction form
    534.39/800.75 = 412.95/x
  3. Step 3: Cross multiply
    534.39x = 800.75 × 412.95
  4. Step 4: Simplify right side
    534.39x = 330,667.65
  5. Step 5: Solve for x
    x = 330,667.65/534.39
  6. Step 6: Final answer
    x = 618.78

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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.