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Finding the Fourth Proportional to 502.83, 693.91 and 281.80

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Solution

The fourth proportional to 502.83, 693.91 and 281.80 is: 388.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.83 : 693.91 = 281.80 : x
  2. Step 2: Convert to fraction form
    502.83/693.91 = 281.80/x
  3. Step 3: Cross multiply
    502.83x = 693.91 × 281.80
  4. Step 4: Simplify right side
    502.83x = 195,543.84
  5. Step 5: Solve for x
    x = 195,543.84/502.83
  6. Step 6: Final answer
    x = 388.89

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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.