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Finding the Fourth Proportional to 764,718.80, 1,147,078.20 and 484,552.40

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Solution

The fourth proportional to 764,718.80, 1,147,078.20 and 484,552.40 is: 726,828.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,718.80 : 1,147,078.20 = 484,552.40 : x
  2. Step 2: Convert to fraction form
    764,718.80/1,147,078.20 = 484,552.40/x
  3. Step 3: Cross multiply
    764,718.80x = 1,147,078.20 × 484,552.40
  4. Step 4: Simplify right side
    764,718.80x = 555,819,494,797.68
  5. Step 5: Solve for x
    x = 555,819,494,797.68/764,718.80
  6. Step 6: Final answer
    x = 726,828.60

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Double scale
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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.