Home / 399,930.46-551,917.52-218,638.79

Finding the Fourth Proportional to 399,930.46, 551,917.52 and 218,638.79

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Solution

The fourth proportional to 399,930.46, 551,917.52 and 218,638.79 is: 301,728.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,930.46 : 551,917.52 = 218,638.79 : x
  2. Step 2: Convert to fraction form
    399,930.46/551,917.52 = 218,638.79/x
  3. Step 3: Cross multiply
    399,930.46x = 551,917.52 × 218,638.79
  4. Step 4: Simplify right side
    399,930.46x = 120,670,576,539.61
  5. Step 5: Solve for x
    x = 120,670,576,539.61/399,930.46
  6. Step 6: Final answer
    x = 301,728.90

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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.