Home / 515,014.20-772,521.30-485,983.80

Finding the Fourth Proportional to 515,014.20, 772,521.30 and 485,983.80

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Solution

The fourth proportional to 515,014.20, 772,521.30 and 485,983.80 is: 728,975.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,014.20 : 772,521.30 = 485,983.80 : x
  2. Step 2: Convert to fraction form
    515,014.20/772,521.30 = 485,983.80/x
  3. Step 3: Cross multiply
    515,014.20x = 772,521.30 × 485,983.80
  4. Step 4: Simplify right side
    515,014.20x = 375,432,836,954.94
  5. Step 5: Solve for x
    x = 375,432,836,954.94/515,014.20
  6. Step 6: Final answer
    x = 728,975.70

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Similar ratio
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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.