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Finding the Fourth Proportional to 343.19, 473.58 and 287.79

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Solution

The fourth proportional to 343.19, 473.58 and 287.79 is: 397.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.19 : 473.58 = 287.79 : x
  2. Step 2: Convert to fraction form
    343.19/473.58 = 287.79/x
  3. Step 3: Cross multiply
    343.19x = 473.58 × 287.79
  4. Step 4: Simplify right side
    343.19x = 136,291.59
  5. Step 5: Solve for x
    x = 136,291.59/343.19
  6. Step 6: Final answer
    x = 397.14

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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.