Home / 639,566.90-959,091.15-218,626.10

Finding the Fourth Proportional to 639,566.90, 959,091.15 and 218,626.10

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Solution

The fourth proportional to 639,566.90, 959,091.15 and 218,626.10 is: 327,850.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,566.90 : 959,091.15 = 218,626.10 : x
  2. Step 2: Convert to fraction form
    639,566.90/959,091.15 = 218,626.10/x
  3. Step 3: Cross multiply
    639,566.90x = 959,091.15 × 218,626.10
  4. Step 4: Simplify right side
    639,566.90x = 209,682,357,669.02
  5. Step 5: Solve for x
    x = 209,682,357,669.02/639,566.90
  6. Step 6: Final answer
    x = 327,850.55

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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.