Home / 764,487.40-1,055,004.30-420,338.20

Finding the Fourth Proportional to 764,487.40, 1,055,004.30 and 420,338.20

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Solution

The fourth proportional to 764,487.40, 1,055,004.30 and 420,338.20 is: 580,073.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,487.40 : 1,055,004.30 = 420,338.20 : x
  2. Step 2: Convert to fraction form
    764,487.40/1,055,004.30 = 420,338.20/x
  3. Step 3: Cross multiply
    764,487.40x = 1,055,004.30 × 420,338.20
  4. Step 4: Simplify right side
    764,487.40x = 443,458,608,454.26
  5. Step 5: Solve for x
    x = 443,458,608,454.26/764,487.40
  6. Step 6: Final answer
    x = 580,073.14

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Double scale
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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.