Home / 781,279.80-1,171,919.70-220,314.30

Finding the Fourth Proportional to 781,279.80, 1,171,919.70 and 220,314.30

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Solution

The fourth proportional to 781,279.80, 1,171,919.70 and 220,314.30 is: 330,471.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,279.80 : 1,171,919.70 = 220,314.30 : x
  2. Step 2: Convert to fraction form
    781,279.80/1,171,919.70 = 220,314.30/x
  3. Step 3: Cross multiply
    781,279.80x = 1,171,919.70 × 220,314.30
  4. Step 4: Simplify right side
    781,279.80x = 258,190,668,361.71
  5. Step 5: Solve for x
    x = 258,190,668,361.71/781,279.80
  6. Step 6: Final answer
    x = 330,471.45

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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.