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Finding the Fourth Proportional to 399,857.04, 551,802.67 and 218,569.69

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Solution

The fourth proportional to 399,857.04, 551,802.67 and 218,569.69 is: 301,626.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,857.04 : 551,802.67 = 218,569.69 : x
  2. Step 2: Convert to fraction form
    399,857.04/551,802.67 = 218,569.69/x
  3. Step 3: Cross multiply
    399,857.04x = 551,802.67 × 218,569.69
  4. Step 4: Simplify right side
    399,857.04x = 120,607,338,523.07
  5. Step 5: Solve for x
    x = 120,607,338,523.07/399,857.04
  6. Step 6: Final answer
    x = 301,626.15

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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.