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Finding the Fourth Proportional to 399,924, 551,894.99 and 218,636.69

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Solution

The fourth proportional to 399,924, 551,894.99 and 218,636.69 is: 301,718.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,924 : 551,894.99 = 218,636.69 : x
  2. Step 2: Convert to fraction form
    399,924/551,894.99 = 218,636.69/x
  3. Step 3: Cross multiply
    399,924x = 551,894.99 × 218,636.69
  4. Step 4: Simplify right side
    399,924x = 120,664,489,988.53
  5. Step 5: Solve for x
    x = 120,664,489,988.53/399,924
  6. Step 6: Final answer
    x = 301,718.55

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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.