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Finding the Fourth Proportional to 317,940.19, 438,754.73 and 172,744.45

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Solution

The fourth proportional to 317,940.19, 438,754.73 and 172,744.45 is: 238,385.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,940.19 : 438,754.73 = 172,744.45 : x
  2. Step 2: Convert to fraction form
    317,940.19/438,754.73 = 172,744.45/x
  3. Step 3: Cross multiply
    317,940.19x = 438,754.73 × 172,744.45
  4. Step 4: Simplify right side
    317,940.19x = 75,792,442,558.14
  5. Step 5: Solve for x
    x = 75,792,442,558.14/317,940.19
  6. Step 6: Final answer
    x = 238,385.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.