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Finding the Fourth Proportional to 626.12, 939.47 and 260.85

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Solution

The fourth proportional to 626.12, 939.47 and 260.85 is: 391.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.12 : 939.47 = 260.85 : x
  2. Step 2: Convert to fraction form
    626.12/939.47 = 260.85/x
  3. Step 3: Cross multiply
    626.12x = 939.47 × 260.85
  4. Step 4: Simplify right side
    626.12x = 245,059.45
  5. Step 5: Solve for x
    x = 245,059.45/626.12
  6. Step 6: Final answer
    x = 391.40

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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.