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Finding the Fourth Proportional to 399,316.28, 551,052.27 and 218,027.64

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Solution

The fourth proportional to 399,316.28, 551,052.27 and 218,027.64 is: 300,875.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,316.28 : 551,052.27 = 218,027.64 : x
  2. Step 2: Convert to fraction form
    399,316.28/551,052.27 = 218,027.64/x
  3. Step 3: Cross multiply
    399,316.28x = 551,052.27 × 218,027.64
  4. Step 4: Simplify right side
    399,316.28x = 120,144,625,944.74
  5. Step 5: Solve for x
    x = 120,144,625,944.74/399,316.28
  6. Step 6: Final answer
    x = 300,875.86

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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.