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Finding the Fourth Proportional to 279,476.64, 385,553.16 and 188,803.44

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Solution

The fourth proportional to 279,476.64, 385,553.16 and 188,803.44 is: 260,464.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,476.64 : 385,553.16 = 188,803.44 : x
  2. Step 2: Convert to fraction form
    279,476.64/385,553.16 = 188,803.44/x
  3. Step 3: Cross multiply
    279,476.64x = 385,553.16 × 188,803.44
  4. Step 4: Simplify right side
    279,476.64x = 72,793,762,910.87
  5. Step 5: Solve for x
    x = 72,793,762,910.87/279,476.64
  6. Step 6: Final answer
    x = 260,464.57

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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.