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Finding the Fourth Proportional to 502.34, 693.21 and 281.32

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Solution

The fourth proportional to 502.34, 693.21 and 281.32 is: 388.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.34 : 693.21 = 281.32 : x
  2. Step 2: Convert to fraction form
    502.34/693.21 = 281.32/x
  3. Step 3: Cross multiply
    502.34x = 693.21 × 281.32
  4. Step 4: Simplify right side
    502.34x = 195,012.10
  5. Step 5: Solve for x
    x = 195,012.10/502.34
  6. Step 6: Final answer
    x = 388.21

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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.