Home / 399,928.05-551,899.31-218,639.79

Finding the Fourth Proportional to 399,928.05, 551,899.31 and 218,639.79

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Solution

The fourth proportional to 399,928.05, 551,899.31 and 218,639.79 is: 301,722.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,928.05 : 551,899.31 = 218,639.79 : x
  2. Step 2: Convert to fraction form
    399,928.05/551,899.31 = 218,639.79/x
  3. Step 3: Cross multiply
    399,928.05x = 551,899.31 × 218,639.79
  4. Step 4: Simplify right side
    399,928.05x = 120,667,148,146.35
  5. Step 5: Solve for x
    x = 120,667,148,146.35/399,928.05
  6. Step 6: Final answer
    x = 301,722.14

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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.