Home / 629,640.36-869,235.93-505,790.64

Finding the Fourth Proportional to 629,640.36, 869,235.93 and 505,790.64

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Solution

The fourth proportional to 629,640.36, 869,235.93 and 505,790.64 is: 698,257.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,640.36 : 869,235.93 = 505,790.64 : x
  2. Step 2: Convert to fraction form
    629,640.36/869,235.93 = 505,790.64/x
  3. Step 3: Cross multiply
    629,640.36x = 869,235.93 × 505,790.64
  4. Step 4: Simplify right side
    629,640.36x = 439,651,397,345.70
  5. Step 5: Solve for x
    x = 439,651,397,345.70/629,640.36
  6. Step 6: Final answer
    x = 698,257.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.