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Finding the Fourth Proportional to 426,121.83, 639,426.96 and 173,355.66

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Solution

The fourth proportional to 426,121.83, 639,426.96 and 173,355.66 is: 260,132.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,121.83 : 639,426.96 = 173,355.66 : x
  2. Step 2: Convert to fraction form
    426,121.83/639,426.96 = 173,355.66/x
  3. Step 3: Cross multiply
    426,121.83x = 639,426.96 × 173,355.66
  4. Step 4: Simplify right side
    426,121.83x = 110,848,282,672.59
  5. Step 5: Solve for x
    x = 110,848,282,672.59/426,121.83
  6. Step 6: Final answer
    x = 260,132.84

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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.