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Finding the Fourth Proportional to 503.75, 694.97 and 307.19

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Solution

The fourth proportional to 503.75, 694.97 and 307.19 is: 423.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.75 : 694.97 = 307.19 : x
  2. Step 2: Convert to fraction form
    503.75/694.97 = 307.19/x
  3. Step 3: Cross multiply
    503.75x = 694.97 × 307.19
  4. Step 4: Simplify right side
    503.75x = 213,487.83
  5. Step 5: Solve for x
    x = 213,487.83/503.75
  6. Step 6: Final answer
    x = 423.80

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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.