Home / 405,921.80-608,882.70-389,592.20

Finding the Fourth Proportional to 405,921.80, 608,882.70 and 389,592.20

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Solution

The fourth proportional to 405,921.80, 608,882.70 and 389,592.20 is: 584,388.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,921.80 : 608,882.70 = 389,592.20 : x
  2. Step 2: Convert to fraction form
    405,921.80/608,882.70 = 389,592.20/x
  3. Step 3: Cross multiply
    405,921.80x = 608,882.70 × 389,592.20
  4. Step 4: Simplify right side
    405,921.80x = 237,215,950,634.94
  5. Step 5: Solve for x
    x = 237,215,950,634.94/405,921.80
  6. Step 6: Final answer
    x = 584,388.30

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1.5x scale

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.