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Finding the Fourth Proportional to 319,126.91, 440,255.59 and 228,449.77

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Solution

The fourth proportional to 319,126.91, 440,255.59 and 228,449.77 is: 315,160.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,126.91 : 440,255.59 = 228,449.77 : x
  2. Step 2: Convert to fraction form
    319,126.91/440,255.59 = 228,449.77/x
  3. Step 3: Cross multiply
    319,126.91x = 440,255.59 × 228,449.77
  4. Step 4: Simplify right side
    319,126.91x = 100,576,286,604.95
  5. Step 5: Solve for x
    x = 100,576,286,604.95/319,126.91
  6. Step 6: Final answer
    x = 315,160.79

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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.