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Finding the Fourth Proportional to 502.31, 693.32 and 305.99

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Solution

The fourth proportional to 502.31, 693.32 and 305.99 is: 422.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.31 : 693.32 = 305.99 : x
  2. Step 2: Convert to fraction form
    502.31/693.32 = 305.99/x
  3. Step 3: Cross multiply
    502.31x = 693.32 × 305.99
  4. Step 4: Simplify right side
    502.31x = 212,143.99
  5. Step 5: Solve for x
    x = 212,143.99/502.31
  6. Step 6: Final answer
    x = 422.34

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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.