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Finding the Fourth Proportional to 502.81, 693.43 and 316.32

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Solution

The fourth proportional to 502.81, 693.43 and 316.32 is: 436.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.81 : 693.43 = 316.32 : x
  2. Step 2: Convert to fraction form
    502.81/693.43 = 316.32/x
  3. Step 3: Cross multiply
    502.81x = 693.43 × 316.32
  4. Step 4: Simplify right side
    502.81x = 219,345.78
  5. Step 5: Solve for x
    x = 219,345.78/502.81
  6. Step 6: Final answer
    x = 436.24

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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.