Home / 287,589.26-431,385-87,908.88

Finding the Fourth Proportional to 287,589.26, 431,385 and 87,908.88

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Solution

The fourth proportional to 287,589.26, 431,385 and 87,908.88 is: 131,863.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,589.26 : 431,385 = 87,908.88 : x
  2. Step 2: Convert to fraction form
    287,589.26/431,385 = 87,908.88/x
  3. Step 3: Cross multiply
    287,589.26x = 431,385 × 87,908.88
  4. Step 4: Simplify right side
    287,589.26x = 37,922,572,198.80
  5. Step 5: Solve for x
    x = 37,922,572,198.80/287,589.26
  6. Step 6: Final answer
    x = 131,863.66

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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.