Home / 639,500.58-959,025.69-212,920.56

Finding the Fourth Proportional to 639,500.58, 959,025.69 and 212,920.56

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Solution

The fourth proportional to 639,500.58, 959,025.69 and 212,920.56 is: 319,305.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,500.58 : 959,025.69 = 212,920.56 : x
  2. Step 2: Convert to fraction form
    639,500.58/959,025.69 = 212,920.56/x
  3. Step 3: Cross multiply
    639,500.58x = 959,025.69 × 212,920.56
  4. Step 4: Simplify right side
    639,500.58x = 204,196,286,969.19
  5. Step 5: Solve for x
    x = 204,196,286,969.19/639,500.58
  6. Step 6: Final answer
    x = 319,305.87

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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.