Home / 830,078.80-1,245,118.20-469,879.90

Finding the Fourth Proportional to 830,078.80, 1,245,118.20 and 469,879.90

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Solution

The fourth proportional to 830,078.80, 1,245,118.20 and 469,879.90 is: 704,819.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,078.80 : 1,245,118.20 = 469,879.90 : x
  2. Step 2: Convert to fraction form
    830,078.80/1,245,118.20 = 469,879.90/x
  3. Step 3: Cross multiply
    830,078.80x = 1,245,118.20 × 469,879.90
  4. Step 4: Simplify right side
    830,078.80x = 585,056,015,304.18
  5. Step 5: Solve for x
    x = 585,056,015,304.18/830,078.80
  6. Step 6: Final answer
    x = 704,819.85

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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.