Home / 928,086.80-1,391,208.60-428,579.60

Finding the Fourth Proportional to 928,086.80, 1,391,208.60 and 428,579.60

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Solution

The fourth proportional to 928,086.80, 1,391,208.60 and 428,579.60 is: 642,443.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    928,086.80 : 1,391,208.60 = 428,579.60 : x
  2. Step 2: Convert to fraction form
    928,086.80/1,391,208.60 = 428,579.60/x
  3. Step 3: Cross multiply
    928,086.80x = 1,391,208.60 × 428,579.60
  4. Step 4: Simplify right side
    928,086.80x = 596,243,625,304.56
  5. Step 5: Solve for x
    x = 596,243,625,304.56/928,086.80
  6. Step 6: Final answer
    x = 642,443.82

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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.