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Finding the Fourth Proportional to 343.69, 474.27 and 288.29

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Solution

The fourth proportional to 343.69, 474.27 and 288.29 is: 397.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.69 : 474.27 = 288.29 : x
  2. Step 2: Convert to fraction form
    343.69/474.27 = 288.29/x
  3. Step 3: Cross multiply
    343.69x = 474.27 × 288.29
  4. Step 4: Simplify right side
    343.69x = 136,727.30
  5. Step 5: Solve for x
    x = 136,727.30/343.69
  6. Step 6: Final answer
    x = 397.82

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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.