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Finding the Fourth Proportional to 840.38, 1,260.36 and 377.87

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Solution

The fourth proportional to 840.38, 1,260.36 and 377.87 is: 566.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    840.38 : 1,260.36 = 377.87 : x
  2. Step 2: Convert to fraction form
    840.38/1,260.36 = 377.87/x
  3. Step 3: Cross multiply
    840.38x = 1,260.36 × 377.87
  4. Step 4: Simplify right side
    840.38x = 476,245.93
  5. Step 5: Solve for x
    x = 476,245.93/840.38
  6. Step 6: Final answer
    x = 566.71

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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.