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Finding the Fourth Proportional to 279,487.62, 385,673.45 and 158,631.36

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Solution

The fourth proportional to 279,487.62, 385,673.45 and 158,631.36 is: 218,900.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,487.62 : 385,673.45 = 158,631.36 : x
  2. Step 2: Convert to fraction form
    279,487.62/385,673.45 = 158,631.36/x
  3. Step 3: Cross multiply
    279,487.62x = 385,673.45 × 158,631.36
  4. Step 4: Simplify right side
    279,487.62x = 61,179,903,889.39
  5. Step 5: Solve for x
    x = 61,179,903,889.39/279,487.62
  6. Step 6: Final answer
    x = 218,900.23

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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.