Home / 764,577.63-1,055,144.20-420,439.66

Finding the Fourth Proportional to 764,577.63, 1,055,144.20 and 420,439.66

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Solution

The fourth proportional to 764,577.63, 1,055,144.20 and 420,439.66 is: 580,221.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,577.63 : 1,055,144.20 = 420,439.66 : x
  2. Step 2: Convert to fraction form
    764,577.63/1,055,144.20 = 420,439.66/x
  3. Step 3: Cross multiply
    764,577.63x = 1,055,144.20 × 420,439.66
  4. Step 4: Simplify right side
    764,577.63x = 443,624,470,551.04
  5. Step 5: Solve for x
    x = 443,624,470,551.04/764,577.63
  6. Step 6: Final answer
    x = 580,221.62

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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.