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Finding the Fourth Proportional to 485,366.30, 728,049.45 and 343,648.70

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Solution

The fourth proportional to 485,366.30, 728,049.45 and 343,648.70 is: 515,473.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,366.30 : 728,049.45 = 343,648.70 : x
  2. Step 2: Convert to fraction form
    485,366.30/728,049.45 = 343,648.70/x
  3. Step 3: Cross multiply
    485,366.30x = 728,049.45 × 343,648.70
  4. Step 4: Simplify right side
    485,366.30x = 250,193,247,028.22
  5. Step 5: Solve for x
    x = 250,193,247,028.22/485,366.30
  6. Step 6: Final answer
    x = 515,473.05

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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.