Home / 764,785.60-1,147,178.40-643,134.40

Finding the Fourth Proportional to 764,785.60, 1,147,178.40 and 643,134.40

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Solution

The fourth proportional to 764,785.60, 1,147,178.40 and 643,134.40 is: 964,701.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,785.60 : 1,147,178.40 = 643,134.40 : x
  2. Step 2: Convert to fraction form
    764,785.60/1,147,178.40 = 643,134.40/x
  3. Step 3: Cross multiply
    764,785.60x = 1,147,178.40 × 643,134.40
  4. Step 4: Simplify right side
    764,785.60x = 737,789,891,976.96
  5. Step 5: Solve for x
    x = 737,789,891,976.96/764,785.60
  6. Step 6: Final answer
    x = 964,701.60

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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.