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Finding the Fourth Proportional to 426,538.44, 639,352.98 and 321,031.08

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Solution

The fourth proportional to 426,538.44, 639,352.98 and 321,031.08 is: 481,204.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,538.44 : 639,352.98 = 321,031.08 : x
  2. Step 2: Convert to fraction form
    426,538.44/639,352.98 = 321,031.08/x
  3. Step 3: Cross multiply
    426,538.44x = 639,352.98 × 321,031.08
  4. Step 4: Simplify right side
    426,538.44x = 205,252,177,670.62
  5. Step 5: Solve for x
    x = 205,252,177,670.62/426,538.44
  6. Step 6: Final answer
    x = 481,204.41

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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.