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Finding the Fourth Proportional to 1,144.92, 1,579.96 and 620.94

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Solution

The fourth proportional to 1,144.92, 1,579.96 and 620.94 is: 856.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,144.92 : 1,579.96 = 620.94 : x
  2. Step 2: Convert to fraction form
    1,144.92/1,579.96 = 620.94/x
  3. Step 3: Cross multiply
    1,144.92x = 1,579.96 × 620.94
  4. Step 4: Simplify right side
    1,144.92x = 981,060.36
  5. Step 5: Solve for x
    x = 981,060.36/1,144.92
  6. Step 6: Final answer
    x = 856.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.