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Finding the Fourth Proportional to 625.65, 938.61 and 317.67

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Solution

The fourth proportional to 625.65, 938.61 and 317.67 is: 476.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.65 : 938.61 = 317.67 : x
  2. Step 2: Convert to fraction form
    625.65/938.61 = 317.67/x
  3. Step 3: Cross multiply
    625.65x = 938.61 × 317.67
  4. Step 4: Simplify right side
    625.65x = 298,168.24
  5. Step 5: Solve for x
    x = 298,168.24/625.65
  6. Step 6: Final answer
    x = 476.57

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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.