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Finding the Fourth Proportional to 399,655.81, 551,524.15 and 218,369.03

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Solution

The fourth proportional to 399,655.81, 551,524.15 and 218,369.03 is: 301,348.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,655.81 : 551,524.15 = 218,369.03 : x
  2. Step 2: Convert to fraction form
    399,655.81/551,524.15 = 218,369.03/x
  3. Step 3: Cross multiply
    399,655.81x = 551,524.15 × 218,369.03
  4. Step 4: Simplify right side
    399,655.81x = 120,435,793,657.08
  5. Step 5: Solve for x
    x = 120,435,793,657.08/399,655.81
  6. Step 6: Final answer
    x = 301,348.79

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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.