Home / 813,978.91-1,123,327.20-451,378.46

Finding the Fourth Proportional to 813,978.91, 1,123,327.20 and 451,378.46

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Solution

The fourth proportional to 813,978.91, 1,123,327.20 and 451,378.46 is: 622,922.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,978.91 : 1,123,327.20 = 451,378.46 : x
  2. Step 2: Convert to fraction form
    813,978.91/1,123,327.20 = 451,378.46/x
  3. Step 3: Cross multiply
    813,978.91x = 1,123,327.20 × 451,378.46
  4. Step 4: Simplify right side
    813,978.91x = 507,045,701,612.11
  5. Step 5: Solve for x
    x = 507,045,701,612.11/813,978.91
  6. Step 6: Final answer
    x = 622,922.41

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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.