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Finding the Fourth Proportional to 553,639.74, 764,022.81 and 298,990.90

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Solution

The fourth proportional to 553,639.74, 764,022.81 and 298,990.90 is: 412,607.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,639.74 : 764,022.81 = 298,990.90 : x
  2. Step 2: Convert to fraction form
    553,639.74/764,022.81 = 298,990.90/x
  3. Step 3: Cross multiply
    553,639.74x = 764,022.81 × 298,990.90
  4. Step 4: Simplify right side
    553,639.74x = 228,435,867,582.43
  5. Step 5: Solve for x
    x = 228,435,867,582.43/553,639.74
  6. Step 6: Final answer
    x = 412,607.43

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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.