Home / 642,734.20-965,138.10-485,140.60

Finding the Fourth Proportional to 642,734.20, 965,138.10 and 485,140.60

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Solution

The fourth proportional to 642,734.20, 965,138.10 and 485,140.60 is: 728,493.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,734.20 : 965,138.10 = 485,140.60 : x
  2. Step 2: Convert to fraction form
    642,734.20/965,138.10 = 485,140.60/x
  3. Step 3: Cross multiply
    642,734.20x = 965,138.10 × 485,140.60
  4. Step 4: Simplify right side
    642,734.20x = 468,227,676,916.86
  5. Step 5: Solve for x
    x = 468,227,676,916.86/642,734.20
  6. Step 6: Final answer
    x = 728,493.48

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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.