Home / 677,890.38-1,015,785.27-428,047.50

Finding the Fourth Proportional to 677,890.38, 1,015,785.27 and 428,047.50

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Solution

The fourth proportional to 677,890.38, 1,015,785.27 and 428,047.50 is: 641,408.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,890.38 : 1,015,785.27 = 428,047.50 : x
  2. Step 2: Convert to fraction form
    677,890.38/1,015,785.27 = 428,047.50/x
  3. Step 3: Cross multiply
    677,890.38x = 1,015,785.27 × 428,047.50
  4. Step 4: Simplify right side
    677,890.38x = 434,804,345,360.33
  5. Step 5: Solve for x
    x = 434,804,345,360.33/677,890.38
  6. Step 6: Final answer
    x = 641,408.05

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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.