Home / 399,865.26-551,814-218,577.90

Finding the Fourth Proportional to 399,865.26, 551,814 and 218,577.90

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Solution

The fourth proportional to 399,865.26, 551,814 and 218,577.90 is: 301,637.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,865.26 : 551,814 = 218,577.90 : x
  2. Step 2: Convert to fraction form
    399,865.26/551,814 = 218,577.90/x
  3. Step 3: Cross multiply
    399,865.26x = 551,814 × 218,577.90
  4. Step 4: Simplify right side
    399,865.26x = 120,614,345,310.60
  5. Step 5: Solve for x
    x = 120,614,345,310.60/399,865.26
  6. Step 6: Final answer
    x = 301,637.47

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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.