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Finding the Fourth Proportional to 279,580.80, 385,807.78 and 158,705.90

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Solution

The fourth proportional to 279,580.80, 385,807.78 and 158,705.90 is: 219,006.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,580.80 : 385,807.78 = 158,705.90 : x
  2. Step 2: Convert to fraction form
    279,580.80/385,807.78 = 158,705.90/x
  3. Step 3: Cross multiply
    279,580.80x = 385,807.78 × 158,705.90
  4. Step 4: Simplify right side
    279,580.80x = 61,229,970,951.90
  5. Step 5: Solve for x
    x = 61,229,970,951.90/279,580.80
  6. Step 6: Final answer
    x = 219,006.35

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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.