Home / 766,099.15-1,148,350.41-428,645.05

Finding the Fourth Proportional to 766,099.15, 1,148,350.41 and 428,645.05

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Solution

The fourth proportional to 766,099.15, 1,148,350.41 and 428,645.05 is: 642,520.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    766,099.15 : 1,148,350.41 = 428,645.05 : x
  2. Step 2: Convert to fraction form
    766,099.15/1,148,350.41 = 428,645.05/x
  3. Step 3: Cross multiply
    766,099.15x = 1,148,350.41 × 428,645.05
  4. Step 4: Simplify right side
    766,099.15x = 492,234,718,911.97
  5. Step 5: Solve for x
    x = 492,234,718,911.97/766,099.15
  6. Step 6: Final answer
    x = 642,520.90

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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.