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Finding the Fourth Proportional to 426,559.88, 639,601.68 and 268,449.50

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Solution

The fourth proportional to 426,559.88, 639,601.68 and 268,449.50 is: 402,524.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,559.88 : 639,601.68 = 268,449.50 : x
  2. Step 2: Convert to fraction form
    426,559.88/639,601.68 = 268,449.50/x
  3. Step 3: Cross multiply
    426,559.88x = 639,601.68 × 268,449.50
  4. Step 4: Simplify right side
    426,559.88x = 171,700,751,195.16
  5. Step 5: Solve for x
    x = 171,700,751,195.16/426,559.88
  6. Step 6: Final answer
    x = 402,524.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.