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Finding the Fourth Proportional to 426,120.71, 639,425.27 and 173,354.54

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Solution

The fourth proportional to 426,120.71, 639,425.27 and 173,354.54 is: 260,131.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,120.71 : 639,425.27 = 173,354.54 : x
  2. Step 2: Convert to fraction form
    426,120.71/639,425.27 = 173,354.54/x
  3. Step 3: Cross multiply
    426,120.71x = 639,425.27 × 173,354.54
  4. Step 4: Simplify right side
    426,120.71x = 110,847,270,781.49
  5. Step 5: Solve for x
    x = 110,847,270,781.49/426,120.71
  6. Step 6: Final answer
    x = 260,131.15

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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.