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Finding the Fourth Proportional to 625, 936.87 and 259.99

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Solution

The fourth proportional to 625, 936.87 and 259.99 is: 389.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    625 : 936.87 = 259.99 : x
  2. Step 2: Convert to fraction form
    625/936.87 = 259.99/x
  3. Step 3: Cross multiply
    625x = 936.87 × 259.99
  4. Step 4: Simplify right side
    625x = 243,576.83
  5. Step 5: Solve for x
    x = 243,576.83/625
  6. Step 6: Final answer
    x = 389.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.