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Finding the Fourth Proportional to 317,849.64, 438,640.41 and 172,655.37

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Solution

The fourth proportional to 317,849.64, 438,640.41 and 172,655.37 is: 238,268.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,849.64 : 438,640.41 = 172,655.37 : x
  2. Step 2: Convert to fraction form
    317,849.64/438,640.41 = 172,655.37/x
  3. Step 3: Cross multiply
    317,849.64x = 438,640.41 × 172,655.37
  4. Step 4: Simplify right side
    317,849.64x = 75,733,622,285.50
  5. Step 5: Solve for x
    x = 75,733,622,285.50/317,849.64
  6. Step 6: Final answer
    x = 238,268.71

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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.