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Finding the Fourth Proportional to 764,978.80, 1,147,468.20 and 484,812.40

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Solution

The fourth proportional to 764,978.80, 1,147,468.20 and 484,812.40 is: 727,218.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,978.80 : 1,147,468.20 = 484,812.40 : x
  2. Step 2: Convert to fraction form
    764,978.80/1,147,468.20 = 484,812.40/x
  3. Step 3: Cross multiply
    764,978.80x = 1,147,468.20 × 484,812.40
  4. Step 4: Simplify right side
    764,978.80x = 556,306,811,965.68
  5. Step 5: Solve for x
    x = 556,306,811,965.68/764,978.80
  6. Step 6: Final answer
    x = 727,218.60

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.