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Finding the Fourth Proportional to 410.54, 611.42 and 405.68

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Solution

The fourth proportional to 410.54, 611.42 and 405.68 is: 604.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.54 : 611.42 = 405.68 : x
  2. Step 2: Convert to fraction form
    410.54/611.42 = 405.68/x
  3. Step 3: Cross multiply
    410.54x = 611.42 × 405.68
  4. Step 4: Simplify right side
    410.54x = 248,035.78
  5. Step 5: Solve for x
    x = 248,035.78/410.54
  6. Step 6: Final answer
    x = 604.18

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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.