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Finding the Fourth Proportional to 317,436.83, 476,279.15 and 139,819.31

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Solution

The fourth proportional to 317,436.83, 476,279.15 and 139,819.31 is: 209,783.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,436.83 : 476,279.15 = 139,819.31 : x
  2. Step 2: Convert to fraction form
    317,436.83/476,279.15 = 139,819.31/x
  3. Step 3: Cross multiply
    317,436.83x = 476,279.15 × 139,819.31
  4. Step 4: Simplify right side
    317,436.83x = 66,593,022,120.39
  5. Step 5: Solve for x
    x = 66,593,022,120.39/317,436.83
  6. Step 6: Final answer
    x = 209,783.54

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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.