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Finding the Fourth Proportional to 405.41, 559.10 and 343.17

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Solution

The fourth proportional to 405.41, 559.10 and 343.17 is: 473.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.41 : 559.10 = 343.17 : x
  2. Step 2: Convert to fraction form
    405.41/559.10 = 343.17/x
  3. Step 3: Cross multiply
    405.41x = 559.10 × 343.17
  4. Step 4: Simplify right side
    405.41x = 191,867.20
  5. Step 5: Solve for x
    x = 191,867.20/405.41
  6. Step 6: Final answer
    x = 473.27

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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.