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Finding the Fourth Proportional to 380,640.60, 571,179.60 and 144,007.20

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Solution

The fourth proportional to 380,640.60, 571,179.60 and 144,007.20 is: 216,093.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,640.60 : 571,179.60 = 144,007.20 : x
  2. Step 2: Convert to fraction form
    380,640.60/571,179.60 = 144,007.20/x
  3. Step 3: Cross multiply
    380,640.60x = 571,179.60 × 144,007.20
  4. Step 4: Simplify right side
    380,640.60x = 82,253,974,893.12
  5. Step 5: Solve for x
    x = 82,253,974,893.12/380,640.60
  6. Step 6: Final answer
    x = 216,093.54

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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.