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Finding the Fourth Proportional to 399,316.52, 551,052.62 and 218,027.89

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Solution

The fourth proportional to 399,316.52, 551,052.62 and 218,027.89 is: 300,876.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,316.52 : 551,052.62 = 218,027.89 : x
  2. Step 2: Convert to fraction form
    399,316.52/551,052.62 = 218,027.89/x
  3. Step 3: Cross multiply
    399,316.52x = 551,052.62 × 218,027.89
  4. Step 4: Simplify right side
    399,316.52x = 120,144,840,017.57
  5. Step 5: Solve for x
    x = 120,144,840,017.57/399,316.52
  6. Step 6: Final answer
    x = 300,876.21

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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.