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Finding the Fourth Proportional to 570,960.40, 855,621.40 and 420,022.80

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Solution

The fourth proportional to 570,960.40, 855,621.40 and 420,022.80 is: 629,431.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,960.40 : 855,621.40 = 420,022.80 : x
  2. Step 2: Convert to fraction form
    570,960.40/855,621.40 = 420,022.80/x
  3. Step 3: Cross multiply
    570,960.40x = 855,621.40 × 420,022.80
  4. Step 4: Simplify right side
    570,960.40x = 359,380,496,167.92
  5. Step 5: Solve for x
    x = 359,380,496,167.92/570,960.40
  6. Step 6: Final answer
    x = 629,431.56

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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.