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Finding the Fourth Proportional to 343.45, 473.11 and 288.15

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Solution

The fourth proportional to 343.45, 473.11 and 288.15 is: 396.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.45 : 473.11 = 288.15 : x
  2. Step 2: Convert to fraction form
    343.45/473.11 = 288.15/x
  3. Step 3: Cross multiply
    343.45x = 473.11 × 288.15
  4. Step 4: Simplify right side
    343.45x = 136,326.65
  5. Step 5: Solve for x
    x = 136,326.65/343.45
  6. Step 6: Final answer
    x = 396.93

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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.