Home / 638,857.08-958,078.20-212,278.38

Finding the Fourth Proportional to 638,857.08, 958,078.20 and 212,278.38

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Solution

The fourth proportional to 638,857.08, 958,078.20 and 212,278.38 is: 318,348.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,857.08 : 958,078.20 = 212,278.38 : x
  2. Step 2: Convert to fraction form
    638,857.08/958,078.20 = 212,278.38/x
  3. Step 3: Cross multiply
    638,857.08x = 958,078.20 × 212,278.38
  4. Step 4: Simplify right side
    638,857.08x = 203,379,288,209.32
  5. Step 5: Solve for x
    x = 203,379,288,209.32/638,857.08
  6. Step 6: Final answer
    x = 318,348.65

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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.