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Finding the Fourth Proportional to 279,474.49, 385,684.23 and 156,988.54

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Solution

The fourth proportional to 279,474.49, 385,684.23 and 156,988.54 is: 216,649.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,474.49 : 385,684.23 = 156,988.54 : x
  2. Step 2: Convert to fraction form
    279,474.49/385,684.23 = 156,988.54/x
  3. Step 3: Cross multiply
    279,474.49x = 385,684.23 × 156,988.54
  4. Step 4: Simplify right side
    279,474.49x = 60,548,004,168.72
  5. Step 5: Solve for x
    x = 60,548,004,168.72/279,474.49
  6. Step 6: Final answer
    x = 216,649.48

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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.