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Finding the Fourth Proportional to 399,679.96, 551,579.34 and 229,939.60

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Solution

The fourth proportional to 399,679.96, 551,579.34 and 229,939.60 is: 317,328.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,679.96 : 551,579.34 = 229,939.60 : x
  2. Step 2: Convert to fraction form
    399,679.96/551,579.34 = 229,939.60/x
  3. Step 3: Cross multiply
    399,679.96x = 551,579.34 × 229,939.60
  4. Step 4: Simplify right side
    399,679.96x = 126,829,932,807.86
  5. Step 5: Solve for x
    x = 126,829,932,807.86/399,679.96
  6. Step 6: Final answer
    x = 317,328.73

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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.