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Finding the Fourth Proportional to 404,660.80, 606,991.20 and 389,108.80

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Solution

The fourth proportional to 404,660.80, 606,991.20 and 389,108.80 is: 583,663.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,660.80 : 606,991.20 = 389,108.80 : x
  2. Step 2: Convert to fraction form
    404,660.80/606,991.20 = 389,108.80/x
  3. Step 3: Cross multiply
    404,660.80x = 606,991.20 × 389,108.80
  4. Step 4: Simplify right side
    404,660.80x = 236,185,617,442.56
  5. Step 5: Solve for x
    x = 236,185,617,442.56/404,660.80
  6. Step 6: Final answer
    x = 583,663.20

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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.