Home / 638,851.12-958,069.32-212,272.38

Finding the Fourth Proportional to 638,851.12, 958,069.32 and 212,272.38

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Solution

The fourth proportional to 638,851.12, 958,069.32 and 212,272.38 is: 318,339.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,851.12 : 958,069.32 = 212,272.38 : x
  2. Step 2: Convert to fraction form
    638,851.12/958,069.32 = 212,272.38/x
  3. Step 3: Cross multiply
    638,851.12x = 958,069.32 × 212,272.38
  4. Step 4: Simplify right side
    638,851.12x = 203,371,653,965.36
  5. Step 5: Solve for x
    x = 203,371,653,965.36/638,851.12
  6. Step 6: Final answer
    x = 318,339.67

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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.