Home / 812,942.30-1,121,845.20-490,665.98

Finding the Fourth Proportional to 812,942.30, 1,121,845.20 and 490,665.98

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Solution

The fourth proportional to 812,942.30, 1,121,845.20 and 490,665.98 is: 677,109.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,942.30 : 1,121,845.20 = 490,665.98 : x
  2. Step 2: Convert to fraction form
    812,942.30/1,121,845.20 = 490,665.98/x
  3. Step 3: Cross multiply
    812,942.30x = 1,121,845.20 × 490,665.98
  4. Step 4: Simplify right side
    812,942.30x = 550,451,274,466.30
  5. Step 5: Solve for x
    x = 550,451,274,466.30/812,942.30
  6. Step 6: Final answer
    x = 677,109.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.