Home / 638,989.20-958,382.04-212,489.52

Finding the Fourth Proportional to 638,989.20, 958,382.04 and 212,489.52

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Solution

The fourth proportional to 638,989.20, 958,382.04 and 212,489.52 is: 318,700.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,989.20 : 958,382.04 = 212,489.52 : x
  2. Step 2: Convert to fraction form
    638,989.20/958,382.04 = 212,489.52/x
  3. Step 3: Cross multiply
    638,989.20x = 958,382.04 × 212,489.52
  4. Step 4: Simplify right side
    638,989.20x = 203,646,139,656.22
  5. Step 5: Solve for x
    x = 203,646,139,656.22/638,989.20
  6. Step 6: Final answer
    x = 318,700.44

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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.