Home / 515,030.20-772,545.30-485,999.80

Finding the Fourth Proportional to 515,030.20, 772,545.30 and 485,999.80

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Solution

The fourth proportional to 515,030.20, 772,545.30 and 485,999.80 is: 728,999.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,030.20 : 772,545.30 = 485,999.80 : x
  2. Step 2: Convert to fraction form
    515,030.20/772,545.30 = 485,999.80/x
  3. Step 3: Cross multiply
    515,030.20x = 772,545.30 × 485,999.80
  4. Step 4: Simplify right side
    515,030.20x = 375,456,861,290.94
  5. Step 5: Solve for x
    x = 375,456,861,290.94/515,030.20
  6. Step 6: Final answer
    x = 728,999.70

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Similar ratio
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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.