Home / 312,788.61-431,609.67-222,111.54

Finding the Fourth Proportional to 312,788.61, 431,609.67 and 222,111.54

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Solution

The fourth proportional to 312,788.61, 431,609.67 and 222,111.54 is: 306,486.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,788.61 : 431,609.67 = 222,111.54 : x
  2. Step 2: Convert to fraction form
    312,788.61/431,609.67 = 222,111.54/x
  3. Step 3: Cross multiply
    312,788.61x = 431,609.67 × 222,111.54
  4. Step 4: Simplify right side
    312,788.61x = 95,865,488,482.59
  5. Step 5: Solve for x
    x = 95,865,488,482.59/312,788.61
  6. Step 6: Final answer
    x = 306,486.51

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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.