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Finding the Fourth Proportional to 618,668.68, 928,081.50 and 219,231.40

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Solution

The fourth proportional to 618,668.68, 928,081.50 and 219,231.40 is: 328,874.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,668.68 : 928,081.50 = 219,231.40 : x
  2. Step 2: Convert to fraction form
    618,668.68/928,081.50 = 219,231.40/x
  3. Step 3: Cross multiply
    618,668.68x = 928,081.50 × 219,231.40
  4. Step 4: Simplify right side
    618,668.68x = 203,464,606,559.10
  5. Step 5: Solve for x
    x = 203,464,606,559.10/618,668.68
  6. Step 6: Final answer
    x = 328,874.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.