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Finding the Fourth Proportional to 1,260.94, 1,891.94 and 557.78

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Solution

The fourth proportional to 1,260.94, 1,891.94 and 557.78 is: 836.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.94 : 1,891.94 = 557.78 : x
  2. Step 2: Convert to fraction form
    1,260.94/1,891.94 = 557.78/x
  3. Step 3: Cross multiply
    1,260.94x = 1,891.94 × 557.78
  4. Step 4: Simplify right side
    1,260.94x = 1,055,288.23
  5. Step 5: Solve for x
    x = 1,055,288.23/1,260.94
  6. Step 6: Final answer
    x = 836.90

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1.5x scale

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.