Home / 399,318.53-551,055.38-218,029.89

Finding the Fourth Proportional to 399,318.53, 551,055.38 and 218,029.89

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Solution

The fourth proportional to 399,318.53, 551,055.38 and 218,029.89 is: 300,878.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,318.53 : 551,055.38 = 218,029.89 : x
  2. Step 2: Convert to fraction form
    399,318.53/551,055.38 = 218,029.89/x
  3. Step 3: Cross multiply
    399,318.53x = 551,055.38 × 218,029.89
  4. Step 4: Simplify right side
    399,318.53x = 120,146,542,795.16
  5. Step 5: Solve for x
    x = 120,146,542,795.16/399,318.53
  6. Step 6: Final answer
    x = 300,878.96

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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.