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Finding the Fourth Proportional to 279,008.78, 385,014.89 and 156,494.41

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Solution

The fourth proportional to 279,008.78, 385,014.89 and 156,494.41 is: 215,952.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,008.78 : 385,014.89 = 156,494.41 : x
  2. Step 2: Convert to fraction form
    279,008.78/385,014.89 = 156,494.41/x
  3. Step 3: Cross multiply
    279,008.78x = 385,014.89 × 156,494.41
  4. Step 4: Simplify right side
    279,008.78x = 60,252,677,480.46
  5. Step 5: Solve for x
    x = 60,252,677,480.46/279,008.78
  6. Step 6: Final answer
    x = 215,952.63

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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.