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Finding the Fourth Proportional to 503.14, 694.45 and 306.61

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Solution

The fourth proportional to 503.14, 694.45 and 306.61 is: 423.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.14 : 694.45 = 306.61 : x
  2. Step 2: Convert to fraction form
    503.14/694.45 = 306.61/x
  3. Step 3: Cross multiply
    503.14x = 694.45 × 306.61
  4. Step 4: Simplify right side
    503.14x = 212,922.81
  5. Step 5: Solve for x
    x = 212,922.81/503.14
  6. Step 6: Final answer
    x = 423.19

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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.