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Finding the Fourth Proportional to 307,149.86, 423,868.92 and 171,192.57

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Solution

The fourth proportional to 307,149.86, 423,868.92 and 171,192.57 is: 236,246.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,149.86 : 423,868.92 = 171,192.57 : x
  2. Step 2: Convert to fraction form
    307,149.86/423,868.92 = 171,192.57/x
  3. Step 3: Cross multiply
    307,149.86x = 423,868.92 × 171,192.57
  4. Step 4: Simplify right side
    307,149.86x = 72,563,209,757.92
  5. Step 5: Solve for x
    x = 72,563,209,757.92/307,149.86
  6. Step 6: Final answer
    x = 236,246.93

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1.5x scale

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.