Home / 287,279.06-431,115.42-100,290.56

Finding the Fourth Proportional to 287,279.06, 431,115.42 and 100,290.56

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Solution

The fourth proportional to 287,279.06, 431,115.42 and 100,290.56 is: 150,504.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,279.06 : 431,115.42 = 100,290.56 : x
  2. Step 2: Convert to fraction form
    287,279.06/431,115.42 = 100,290.56/x
  3. Step 3: Cross multiply
    287,279.06x = 431,115.42 × 100,290.56
  4. Step 4: Simplify right side
    287,279.06x = 43,236,806,896.44
  5. Step 5: Solve for x
    x = 43,236,806,896.44/287,279.06
  6. Step 6: Final answer
    x = 150,504.55

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1.5x scale

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.