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Finding the Fourth Proportional to 502.97, 693.99 and 316.40

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Solution

The fourth proportional to 502.97, 693.99 and 316.40 is: 436.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.97 : 693.99 = 316.40 : x
  2. Step 2: Convert to fraction form
    502.97/693.99 = 316.40/x
  3. Step 3: Cross multiply
    502.97x = 693.99 × 316.40
  4. Step 4: Simplify right side
    502.97x = 219,574.97
  5. Step 5: Solve for x
    x = 219,574.97/502.97
  6. Step 6: Final answer
    x = 436.56

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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.