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Finding the Fourth Proportional to 399,367.13, 551,127.58 and 218,079.41

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Solution

The fourth proportional to 399,367.13, 551,127.58 and 218,079.41 is: 300,950.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,367.13 : 551,127.58 = 218,079.41 : x
  2. Step 2: Convert to fraction form
    399,367.13/551,127.58 = 218,079.41/x
  3. Step 3: Cross multiply
    399,367.13x = 551,127.58 × 218,079.41
  4. Step 4: Simplify right side
    399,367.13x = 120,189,574,180.29
  5. Step 5: Solve for x
    x = 120,189,574,180.29/399,367.13
  6. Step 6: Final answer
    x = 300,950.09

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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.