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Finding the Fourth Proportional to 402,481.30, 603,721.95 and 215,857.30

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Solution

The fourth proportional to 402,481.30, 603,721.95 and 215,857.30 is: 323,785.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,481.30 : 603,721.95 = 215,857.30 : x
  2. Step 2: Convert to fraction form
    402,481.30/603,721.95 = 215,857.30/x
  3. Step 3: Cross multiply
    402,481.30x = 603,721.95 × 215,857.30
  4. Step 4: Simplify right side
    402,481.30x = 130,317,790,077.74
  5. Step 5: Solve for x
    x = 130,317,790,077.74/402,481.30
  6. Step 6: Final answer
    x = 323,785.95

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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.