Home / 305,558.27-421,747.91-208,801.28

Finding the Fourth Proportional to 305,558.27, 421,747.91 and 208,801.28

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Solution

The fourth proportional to 305,558.27, 421,747.91 and 208,801.28 is: 288,198.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,558.27 : 421,747.91 = 208,801.28 : x
  2. Step 2: Convert to fraction form
    305,558.27/421,747.91 = 208,801.28/x
  3. Step 3: Cross multiply
    305,558.27x = 421,747.91 × 208,801.28
  4. Step 4: Simplify right side
    305,558.27x = 88,061,500,292.58
  5. Step 5: Solve for x
    x = 88,061,500,292.58/305,558.27
  6. Step 6: Final answer
    x = 288,198.72

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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.