Home / 830,413,612.20-1,245,620,418.30-485,189,538.60

Finding the Fourth Proportional to 830,413,612.20, 1,245,620,418.30 and 485,189,538.60

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Solution

The fourth proportional to 830,413,612.20, 1,245,620,418.30 and 485,189,538.60 is: 727,784,307.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,413,612.20 : 1,245,620,418.30 = 485,189,538.60 : x
  2. Step 2: Convert to fraction form
    830,413,612.20/1,245,620,418.30 = 485,189,538.60/x
  3. Step 3: Cross multiply
    830,413,612.20x = 1,245,620,418.30 × 485,189,538.60
  4. Step 4: Simplify right side
    830,413,612.20x = 604,361,996,025,715,968
  5. Step 5: Solve for x
    x = 604,361,996,025,715,968/830,413,612.20
  6. Step 6: Final answer
    x = 727,784,307.90

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Double scale
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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.