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Finding the Fourth Proportional to 411.17, 613.26 and 346.59

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Solution

The fourth proportional to 411.17, 613.26 and 346.59 is: 516.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.17 : 613.26 = 346.59 : x
  2. Step 2: Convert to fraction form
    411.17/613.26 = 346.59/x
  3. Step 3: Cross multiply
    411.17x = 613.26 × 346.59
  4. Step 4: Simplify right side
    411.17x = 212,549.78
  5. Step 5: Solve for x
    x = 212,549.78/411.17
  6. Step 6: Final answer
    x = 516.95

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.