Home / 764,910.20-1,145,810.10-391,143.80

Finding the Fourth Proportional to 764,910.20, 1,145,810.10 and 391,143.80

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Solution

The fourth proportional to 764,910.20, 1,145,810.10 and 391,143.80 is: 585,920.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,910.20 : 1,145,810.10 = 391,143.80 : x
  2. Step 2: Convert to fraction form
    764,910.20/1,145,810.10 = 391,143.80/x
  3. Step 3: Cross multiply
    764,910.20x = 1,145,810.10 × 391,143.80
  4. Step 4: Simplify right side
    764,910.20x = 448,176,516,592.38
  5. Step 5: Solve for x
    x = 448,176,516,592.38/764,910.20
  6. Step 6: Final answer
    x = 585,920.43

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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.