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Finding the Fourth Proportional to 502.84, 693.90 and 281.77

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Solution

The fourth proportional to 502.84, 693.90 and 281.77 is: 388.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.84 : 693.90 = 281.77 : x
  2. Step 2: Convert to fraction form
    502.84/693.90 = 281.77/x
  3. Step 3: Cross multiply
    502.84x = 693.90 × 281.77
  4. Step 4: Simplify right side
    502.84x = 195,520.20
  5. Step 5: Solve for x
    x = 195,520.20/502.84
  6. Step 6: Final answer
    x = 388.83

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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.