Home / 764,611.40-1,055,230.91-420,507.92

Finding the Fourth Proportional to 764,611.40, 1,055,230.91 and 420,507.92

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Solution

The fourth proportional to 764,611.40, 1,055,230.91 and 420,507.92 is: 580,337.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,611.40 : 1,055,230.91 = 420,507.92 : x
  2. Step 2: Convert to fraction form
    764,611.40/1,055,230.91 = 420,507.92/x
  3. Step 3: Cross multiply
    764,611.40x = 1,055,230.91 × 420,507.92
  4. Step 4: Simplify right side
    764,611.40x = 443,732,947,705.11
  5. Step 5: Solve for x
    x = 443,732,947,705.11/764,611.40
  6. Step 6: Final answer
    x = 580,337.87

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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.