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Finding the Fourth Proportional to 279,846.78, 386,197.58 and 158,985.87

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Solution

The fourth proportional to 279,846.78, 386,197.58 and 158,985.87 is: 219,405.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,846.78 : 386,197.58 = 158,985.87 : x
  2. Step 2: Convert to fraction form
    279,846.78/386,197.58 = 158,985.87/x
  3. Step 3: Cross multiply
    279,846.78x = 386,197.58 × 158,985.87
  4. Step 4: Simplify right side
    279,846.78x = 61,399,958,248.19
  5. Step 5: Solve for x
    x = 61,399,958,248.19/279,846.78
  6. Step 6: Final answer
    x = 219,405.63

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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.