Home / 405,822.80-608,734.20-386,469.20

Finding the Fourth Proportional to 405,822.80, 608,734.20 and 386,469.20

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Solution

The fourth proportional to 405,822.80, 608,734.20 and 386,469.20 is: 579,703.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,822.80 : 608,734.20 = 386,469.20 : x
  2. Step 2: Convert to fraction form
    405,822.80/608,734.20 = 386,469.20/x
  3. Step 3: Cross multiply
    405,822.80x = 608,734.20 × 386,469.20
  4. Step 4: Simplify right side
    405,822.80x = 235,257,019,286.64
  5. Step 5: Solve for x
    x = 235,257,019,286.64/405,822.80
  6. Step 6: Final answer
    x = 579,703.80

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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.