Home / 1,121,557.60-1,682,336.40-820,407.70

Finding the Fourth Proportional to 1,121,557.60, 1,682,336.40 and 820,407.70

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Solution

The fourth proportional to 1,121,557.60, 1,682,336.40 and 820,407.70 is: 1,230,611.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121,557.60 : 1,682,336.40 = 820,407.70 : x
  2. Step 2: Convert to fraction form
    1,121,557.60/1,682,336.40 = 820,407.70/x
  3. Step 3: Cross multiply
    1,121,557.60x = 1,682,336.40 × 820,407.70
  4. Step 4: Simplify right side
    1,121,557.60x = 1,380,201,736,550.28
  5. Step 5: Solve for x
    x = 1,380,201,736,550.28/1,121,557.60
  6. Step 6: Final answer
    x = 1,230,611.55

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Double scale
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Similar ratio
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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.