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Finding the Fourth Proportional to 419,786.40, 629,679.60 and 402,290.40

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Solution

The fourth proportional to 419,786.40, 629,679.60 and 402,290.40 is: 603,435.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,786.40 : 629,679.60 = 402,290.40 : x
  2. Step 2: Convert to fraction form
    419,786.40/629,679.60 = 402,290.40/x
  3. Step 3: Cross multiply
    419,786.40x = 629,679.60 × 402,290.40
  4. Step 4: Simplify right side
    419,786.40x = 253,314,058,155.84
  5. Step 5: Solve for x
    x = 253,314,058,155.84/419,786.40
  6. Step 6: Final answer
    x = 603,435.60

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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.