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Finding the Fourth Proportional to 307,661.20, 424,593.77 and 171,721.67

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Solution

The fourth proportional to 307,661.20, 424,593.77 and 171,721.67 is: 236,987.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,661.20 : 424,593.77 = 171,721.67 : x
  2. Step 2: Convert to fraction form
    307,661.20/424,593.77 = 171,721.67/x
  3. Step 3: Cross multiply
    307,661.20x = 424,593.77 × 171,721.67
  4. Step 4: Simplify right side
    307,661.20x = 72,911,948,274.42
  5. Step 5: Solve for x
    x = 72,911,948,274.42/307,661.20
  6. Step 6: Final answer
    x = 236,987.79

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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.