Home / 399,454.13-551,243.78-218,166.11

Finding the Fourth Proportional to 399,454.13, 551,243.78 and 218,166.11

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Solution

The fourth proportional to 399,454.13, 551,243.78 and 218,166.11 is: 301,067.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,454.13 : 551,243.78 = 218,166.11 : x
  2. Step 2: Convert to fraction form
    399,454.13/551,243.78 = 218,166.11/x
  3. Step 3: Cross multiply
    399,454.13x = 551,243.78 × 218,166.11
  4. Step 4: Simplify right side
    399,454.13x = 120,262,710,182.53
  5. Step 5: Solve for x
    x = 120,262,710,182.53/399,454.13
  6. Step 6: Final answer
    x = 301,067.63

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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.