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Finding the Fourth Proportional to 343.31, 515.02 and 189.31

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Solution

The fourth proportional to 343.31, 515.02 and 189.31 is: 284.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.31 : 515.02 = 189.31 : x
  2. Step 2: Convert to fraction form
    343.31/515.02 = 189.31/x
  3. Step 3: Cross multiply
    343.31x = 515.02 × 189.31
  4. Step 4: Simplify right side
    343.31x = 97,498.44
  5. Step 5: Solve for x
    x = 97,498.44/343.31
  6. Step 6: Final answer
    x = 284.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.