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Finding the Fourth Proportional to 892,728.72, 1,231,974.36 and 490,320.72

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Solution

The fourth proportional to 892,728.72, 1,231,974.36 and 490,320.72 is: 676,647.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    892,728.72 : 1,231,974.36 = 490,320.72 : x
  2. Step 2: Convert to fraction form
    892,728.72/1,231,974.36 = 490,320.72/x
  3. Step 3: Cross multiply
    892,728.72x = 1,231,974.36 × 490,320.72
  4. Step 4: Simplify right side
    892,728.72x = 604,062,555,216.74
  5. Step 5: Solve for x
    x = 604,062,555,216.74/892,728.72
  6. Step 6: Final answer
    x = 676,647.39

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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.