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Finding the Fourth Proportional to 307,356, 424,158.78 and 171,388.62

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Solution

The fourth proportional to 307,356, 424,158.78 and 171,388.62 is: 236,520.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,356 : 424,158.78 = 171,388.62 : x
  2. Step 2: Convert to fraction form
    307,356/424,158.78 = 171,388.62/x
  3. Step 3: Cross multiply
    307,356x = 424,158.78 × 171,388.62
  4. Step 4: Simplify right side
    307,356x = 72,695,987,965.08
  5. Step 5: Solve for x
    x = 72,695,987,965.08/307,356
  6. Step 6: Final answer
    x = 236,520.48

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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.