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Finding the Fourth Proportional to 1,260.44, 1,890.66 and 394.76

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Solution

The fourth proportional to 1,260.44, 1,890.66 and 394.76 is: 592.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.44 : 1,890.66 = 394.76 : x
  2. Step 2: Convert to fraction form
    1,260.44/1,890.66 = 394.76/x
  3. Step 3: Cross multiply
    1,260.44x = 1,890.66 × 394.76
  4. Step 4: Simplify right side
    1,260.44x = 746,356.94
  5. Step 5: Solve for x
    x = 746,356.94/1,260.44
  6. Step 6: Final answer
    x = 592.14

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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.