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Finding the Fourth Proportional to 399,703.68, 551,584.44 and 218,411.73

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Solution

The fourth proportional to 399,703.68, 551,584.44 and 218,411.73 is: 301,404.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,703.68 : 551,584.44 = 218,411.73 : x
  2. Step 2: Convert to fraction form
    399,703.68/551,584.44 = 218,411.73/x
  3. Step 3: Cross multiply
    399,703.68x = 551,584.44 × 218,411.73
  4. Step 4: Simplify right side
    399,703.68x = 120,472,511,781.48
  5. Step 5: Solve for x
    x = 120,472,511,781.48/399,703.68
  6. Step 6: Final answer
    x = 301,404.56

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1.5x scale

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.