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Finding the Fourth Proportional to 764,950.08, 1,055,657.12 and 420,800.64

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Solution

The fourth proportional to 764,950.08, 1,055,657.12 and 420,800.64 is: 580,719.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,950.08 : 1,055,657.12 = 420,800.64 : x
  2. Step 2: Convert to fraction form
    764,950.08/1,055,657.12 = 420,800.64/x
  3. Step 3: Cross multiply
    764,950.08x = 1,055,657.12 × 420,800.64
  4. Step 4: Simplify right side
    764,950.08x = 444,221,191,716.56
  5. Step 5: Solve for x
    x = 444,221,191,716.56/764,950.08
  6. Step 6: Final answer
    x = 580,719.19

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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.