Home / 285,515.40-428,273.10-179,992.20

Finding the Fourth Proportional to 285,515.40, 428,273.10 and 179,992.20

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Solution

The fourth proportional to 285,515.40, 428,273.10 and 179,992.20 is: 269,988.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,515.40 : 428,273.10 = 179,992.20 : x
  2. Step 2: Convert to fraction form
    285,515.40/428,273.10 = 179,992.20/x
  3. Step 3: Cross multiply
    285,515.40x = 428,273.10 × 179,992.20
  4. Step 4: Simplify right side
    285,515.40x = 77,085,817,469.82
  5. Step 5: Solve for x
    x = 77,085,817,469.82/285,515.40
  6. Step 6: Final answer
    x = 269,988.30

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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.