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Finding the Fourth Proportional to 399,282.66, 551,007.23 and 217,994.58

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Solution

The fourth proportional to 399,282.66, 551,007.23 and 217,994.58 is: 300,830.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,282.66 : 551,007.23 = 217,994.58 : x
  2. Step 2: Convert to fraction form
    399,282.66/551,007.23 = 217,994.58/x
  3. Step 3: Cross multiply
    399,282.66x = 551,007.23 × 217,994.58
  4. Step 4: Simplify right side
    399,282.66x = 120,116,588,590.84
  5. Step 5: Solve for x
    x = 120,116,588,590.84/399,282.66
  6. Step 6: Final answer
    x = 300,830.97

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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.