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Finding the Fourth Proportional to 839.87, 1,260.19 and 377.40

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Solution

The fourth proportional to 839.87, 1,260.19 and 377.40 is: 566.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.87 : 1,260.19 = 377.40 : x
  2. Step 2: Convert to fraction form
    839.87/1,260.19 = 377.40/x
  3. Step 3: Cross multiply
    839.87x = 1,260.19 × 377.40
  4. Step 4: Simplify right side
    839.87x = 475,597.32
  5. Step 5: Solve for x
    x = 475,597.32/839.87
  6. Step 6: Final answer
    x = 566.27

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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.