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Finding the Fourth Proportional to 317,220.14, 475,954.75 and 139,602.56

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Solution

The fourth proportional to 317,220.14, 475,954.75 and 139,602.56 is: 209,458.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,220.14 : 475,954.75 = 139,602.56 : x
  2. Step 2: Convert to fraction form
    317,220.14/475,954.75 = 139,602.56/x
  3. Step 3: Cross multiply
    317,220.14x = 475,954.75 × 139,602.56
  4. Step 4: Simplify right side
    317,220.14x = 66,444,498,815.38
  5. Step 5: Solve for x
    x = 66,444,498,815.38/317,220.14
  6. Step 6: Final answer
    x = 209,458.64

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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.