Home / 678,287.64-1,015,871.60-378,103.70

Finding the Fourth Proportional to 678,287.64, 1,015,871.60 and 378,103.70

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Solution

The fourth proportional to 678,287.64, 1,015,871.60 and 378,103.70 is: 566,286.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,287.64 : 1,015,871.60 = 378,103.70 : x
  2. Step 2: Convert to fraction form
    678,287.64/1,015,871.60 = 378,103.70/x
  3. Step 3: Cross multiply
    678,287.64x = 1,015,871.60 × 378,103.70
  4. Step 4: Simplify right side
    678,287.64x = 384,104,810,684.92
  5. Step 5: Solve for x
    x = 384,104,810,684.92/678,287.64
  6. Step 6: Final answer
    x = 566,286.02

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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.