Home / 764,815.34-1,055,470.74-420,665.78

Finding the Fourth Proportional to 764,815.34, 1,055,470.74 and 420,665.78

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Solution

The fourth proportional to 764,815.34, 1,055,470.74 and 420,665.78 is: 580,532.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,815.34 : 1,055,470.74 = 420,665.78 : x
  2. Step 2: Convert to fraction form
    764,815.34/1,055,470.74 = 420,665.78/x
  3. Step 3: Cross multiply
    764,815.34x = 1,055,470.74 × 420,665.78
  4. Step 4: Simplify right side
    764,815.34x = 444,000,422,109.28
  5. Step 5: Solve for x
    x = 444,000,422,109.28/764,815.34
  6. Step 6: Final answer
    x = 580,532.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.