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Finding the Fourth Proportional to 503.18, 694.46 and 282.21

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Solution

The fourth proportional to 503.18, 694.46 and 282.21 is: 389.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.18 : 694.46 = 282.21 : x
  2. Step 2: Convert to fraction form
    503.18/694.46 = 282.21/x
  3. Step 3: Cross multiply
    503.18x = 694.46 × 282.21
  4. Step 4: Simplify right side
    503.18x = 195,978.67
  5. Step 5: Solve for x
    x = 195,978.67/503.18
  6. Step 6: Final answer
    x = 389.48

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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.