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Finding the Fourth Proportional to 308,909.12, 426,167.90 and 187,953.44

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Solution

The fourth proportional to 308,909.12, 426,167.90 and 187,953.44 is: 259,298.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,909.12 : 426,167.90 = 187,953.44 : x
  2. Step 2: Convert to fraction form
    308,909.12/426,167.90 = 187,953.44/x
  3. Step 3: Cross multiply
    308,909.12x = 426,167.90 × 187,953.44
  4. Step 4: Simplify right side
    308,909.12x = 80,099,722,822.58
  5. Step 5: Solve for x
    x = 80,099,722,822.58/308,909.12
  6. Step 6: Final answer
    x = 259,298.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.