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Finding the Fourth Proportional to 1,260.48, 1,890.24 and 576

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Solution

The fourth proportional to 1,260.48, 1,890.24 and 576 is: 863.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.48 : 1,890.24 = 576 : x
  2. Step 2: Convert to fraction form
    1,260.48/1,890.24 = 576/x
  3. Step 3: Cross multiply
    1,260.48x = 1,890.24 × 576
  4. Step 4: Simplify right side
    1,260.48x = 1,088,778.24
  5. Step 5: Solve for x
    x = 1,088,778.24/1,260.48
  6. Step 6: Final answer
    x = 863.78

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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.