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Finding the Fourth Proportional to 309,391.64, 426,934.38 and 171,574.52

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Solution

The fourth proportional to 309,391.64, 426,934.38 and 171,574.52 is: 236,758.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,391.64 : 426,934.38 = 171,574.52 : x
  2. Step 2: Convert to fraction form
    309,391.64/426,934.38 = 171,574.52/x
  3. Step 3: Cross multiply
    309,391.64x = 426,934.38 × 171,574.52
  4. Step 4: Simplify right side
    309,391.64x = 73,251,061,320.00
  5. Step 5: Solve for x
    x = 73,251,061,320.00/309,391.64
  6. Step 6: Final answer
    x = 236,758.37

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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.