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Finding the Fourth Proportional to 426,751.68, 639,906.90 and 156,810.93

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Solution

The fourth proportional to 426,751.68, 639,906.90 and 156,810.93 is: 235,135.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,751.68 : 639,906.90 = 156,810.93 : x
  2. Step 2: Convert to fraction form
    426,751.68/639,906.90 = 156,810.93/x
  3. Step 3: Cross multiply
    426,751.68x = 639,906.90 × 156,810.93
  4. Step 4: Simplify right side
    426,751.68x = 100,344,396,102.42
  5. Step 5: Solve for x
    x = 100,344,396,102.42/426,751.68
  6. Step 6: Final answer
    x = 235,135.33

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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.