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Finding the Fourth Proportional to 317,813.82, 438,586.29 and 172,621.01

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Solution

The fourth proportional to 317,813.82, 438,586.29 and 172,621.01 is: 238,218.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,813.82 : 438,586.29 = 172,621.01 : x
  2. Step 2: Convert to fraction form
    317,813.82/438,586.29 = 172,621.01/x
  3. Step 3: Cross multiply
    317,813.82x = 438,586.29 × 172,621.01
  4. Step 4: Simplify right side
    317,813.82x = 75,709,205,295.92
  5. Step 5: Solve for x
    x = 75,709,205,295.92/317,813.82
  6. Step 6: Final answer
    x = 238,218.73

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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.