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Finding the Fourth Proportional to 368,639.52, 553,092.43 and 128,788.84

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Solution

The fourth proportional to 368,639.52, 553,092.43 and 128,788.84 is: 193,229.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,639.52 : 553,092.43 = 128,788.84 : x
  2. Step 2: Convert to fraction form
    368,639.52/553,092.43 = 128,788.84/x
  3. Step 3: Cross multiply
    368,639.52x = 553,092.43 × 128,788.84
  4. Step 4: Simplify right side
    368,639.52x = 71,232,133,313.78
  5. Step 5: Solve for x
    x = 71,232,133,313.78/368,639.52
  6. Step 6: Final answer
    x = 193,229.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.