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Finding the Fourth Proportional to 279,364.16, 385,074.96 and 188,691.68

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Solution

The fourth proportional to 279,364.16, 385,074.96 and 188,691.68 is: 260,092.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,364.16 : 385,074.96 = 188,691.68 : x
  2. Step 2: Convert to fraction form
    279,364.16/385,074.96 = 188,691.68/x
  3. Step 3: Cross multiply
    279,364.16x = 385,074.96 × 188,691.68
  4. Step 4: Simplify right side
    279,364.16x = 72,660,441,128.33
  5. Step 5: Solve for x
    x = 72,660,441,128.33/279,364.16
  6. Step 6: Final answer
    x = 260,092.21

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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.