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Finding the Fourth Proportional to 504.50, 694.37 and 485.87

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Solution

The fourth proportional to 504.50, 694.37 and 485.87 is: 668.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.50 : 694.37 = 485.87 : x
  2. Step 2: Convert to fraction form
    504.50/694.37 = 485.87/x
  3. Step 3: Cross multiply
    504.50x = 694.37 × 485.87
  4. Step 4: Simplify right side
    504.50x = 337,371.29
  5. Step 5: Solve for x
    x = 337,371.29/504.50
  6. Step 6: Final answer
    x = 668.73

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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.