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Finding the Fourth Proportional to 553,639.66, 764,022.71 and 298,990.85

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Solution

The fourth proportional to 553,639.66, 764,022.71 and 298,990.85 is: 412,607.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,639.66 : 764,022.71 = 298,990.85 : x
  2. Step 2: Convert to fraction form
    553,639.66/764,022.71 = 298,990.85/x
  3. Step 3: Cross multiply
    553,639.66x = 764,022.71 × 298,990.85
  4. Step 4: Simplify right side
    553,639.66x = 228,435,796,409.57
  5. Step 5: Solve for x
    x = 228,435,796,409.57/553,639.66
  6. Step 6: Final answer
    x = 412,607.36

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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.