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Finding the Fourth Proportional to 669,074.59, 922,903 and 396,949.87

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Solution

The fourth proportional to 669,074.59, 922,903 and 396,949.87 is: 547,541.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,074.59 : 922,903 = 396,949.87 : x
  2. Step 2: Convert to fraction form
    669,074.59/922,903 = 396,949.87/x
  3. Step 3: Cross multiply
    669,074.59x = 922,903 × 396,949.87
  4. Step 4: Simplify right side
    669,074.59x = 366,346,225,872.61
  5. Step 5: Solve for x
    x = 366,346,225,872.61/669,074.59
  6. Step 6: Final answer
    x = 547,541.68

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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.