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Finding the Fourth Proportional to 343.94, 474.34 and 342.21

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Solution

The fourth proportional to 343.94, 474.34 and 342.21 is: 471.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.94 : 474.34 = 342.21 : x
  2. Step 2: Convert to fraction form
    343.94/474.34 = 342.21/x
  3. Step 3: Cross multiply
    343.94x = 474.34 × 342.21
  4. Step 4: Simplify right side
    343.94x = 162,322.18
  5. Step 5: Solve for x
    x = 162,322.18/343.94
  6. Step 6: Final answer
    x = 471.95

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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.