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Finding the Fourth Proportional to 625.80, 938.30 and 260.49

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Solution

The fourth proportional to 625.80, 938.30 and 260.49 is: 390.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.80 : 938.30 = 260.49 : x
  2. Step 2: Convert to fraction form
    625.80/938.30 = 260.49/x
  3. Step 3: Cross multiply
    625.80x = 938.30 × 260.49
  4. Step 4: Simplify right side
    625.80x = 244,416.46
  5. Step 5: Solve for x
    x = 244,416.46/625.80
  6. Step 6: Final answer
    x = 390.57

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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.