Home / 399,310.03-551,032.09-218,029.60

Finding the Fourth Proportional to 399,310.03, 551,032.09 and 218,029.60

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Solution

The fourth proportional to 399,310.03, 551,032.09 and 218,029.60 is: 300,872.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,310.03 : 551,032.09 = 218,029.60 : x
  2. Step 2: Convert to fraction form
    399,310.03/551,032.09 = 218,029.60/x
  3. Step 3: Cross multiply
    399,310.03x = 551,032.09 × 218,029.60
  4. Step 4: Simplify right side
    399,310.03x = 120,141,306,169.86
  5. Step 5: Solve for x
    x = 120,141,306,169.86/399,310.03
  6. Step 6: Final answer
    x = 300,872.25

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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.