Home / 812,811.80-1,219,217.70-493,947.20

Finding the Fourth Proportional to 812,811.80, 1,219,217.70 and 493,947.20

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Solution

The fourth proportional to 812,811.80, 1,219,217.70 and 493,947.20 is: 740,920.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,811.80 : 1,219,217.70 = 493,947.20 : x
  2. Step 2: Convert to fraction form
    812,811.80/1,219,217.70 = 493,947.20/x
  3. Step 3: Cross multiply
    812,811.80x = 1,219,217.70 × 493,947.20
  4. Step 4: Simplify right side
    812,811.80x = 602,229,169,105.44
  5. Step 5: Solve for x
    x = 602,229,169,105.44/812,811.80
  6. Step 6: Final answer
    x = 740,920.80

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Double scale
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Similar ratio
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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.