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Finding the Fourth Proportional to 625.52, 861.44 and 623.67

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Solution

The fourth proportional to 625.52, 861.44 and 623.67 is: 858.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.52 : 861.44 = 623.67 : x
  2. Step 2: Convert to fraction form
    625.52/861.44 = 623.67/x
  3. Step 3: Cross multiply
    625.52x = 861.44 × 623.67
  4. Step 4: Simplify right side
    625.52x = 537,247.94
  5. Step 5: Solve for x
    x = 537,247.94/625.52
  6. Step 6: Final answer
    x = 858.88

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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.