Home / 399,942.96-551,934.78-218,651.28

Finding the Fourth Proportional to 399,942.96, 551,934.78 and 218,651.28

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Solution

The fourth proportional to 399,942.96, 551,934.78 and 218,651.28 is: 301,746.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,942.96 : 551,934.78 = 218,651.28 : x
  2. Step 2: Convert to fraction form
    399,942.96/551,934.78 = 218,651.28/x
  3. Step 3: Cross multiply
    399,942.96x = 551,934.78 × 218,651.28
  4. Step 4: Simplify right side
    399,942.96x = 120,681,246,123.52
  5. Step 5: Solve for x
    x = 120,681,246,123.52/399,942.96
  6. Step 6: Final answer
    x = 301,746.14

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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.