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Finding the Fourth Proportional to 391,665, 540,668.52 and 248,644.92

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Solution

The fourth proportional to 391,665, 540,668.52 and 248,644.92 is: 343,238.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,665 : 540,668.52 = 248,644.92 : x
  2. Step 2: Convert to fraction form
    391,665/540,668.52 = 248,644.92/x
  3. Step 3: Cross multiply
    391,665x = 540,668.52 × 248,644.92
  4. Step 4: Simplify right side
    391,665x = 134,434,480,901.92
  5. Step 5: Solve for x
    x = 134,434,480,901.92/391,665
  6. Step 6: Final answer
    x = 343,238.43

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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.