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Finding the Fourth Proportional to 279,939.80, 419,909.70 and 174,963.80

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Solution

The fourth proportional to 279,939.80, 419,909.70 and 174,963.80 is: 262,445.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,939.80 : 419,909.70 = 174,963.80 : x
  2. Step 2: Convert to fraction form
    279,939.80/419,909.70 = 174,963.80/x
  3. Step 3: Cross multiply
    279,939.80x = 419,909.70 × 174,963.80
  4. Step 4: Simplify right side
    279,939.80x = 73,468,996,768.86
  5. Step 5: Solve for x
    x = 73,468,996,768.86/279,939.80
  6. Step 6: Final answer
    x = 262,445.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.