Home / 399,870.71-551,821.62-218,583.37

Finding the Fourth Proportional to 399,870.71, 551,821.62 and 218,583.37

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Solution

The fourth proportional to 399,870.71, 551,821.62 and 218,583.37 is: 301,645.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,870.71 : 551,821.62 = 218,583.37 : x
  2. Step 2: Convert to fraction form
    399,870.71/551,821.62 = 218,583.37/x
  3. Step 3: Cross multiply
    399,870.71x = 551,821.62 × 218,583.37
  4. Step 4: Simplify right side
    399,870.71x = 120,619,029,338.46
  5. Step 5: Solve for x
    x = 120,619,029,338.46/399,870.71
  6. Step 6: Final answer
    x = 301,645.07

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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.