Home / 638,930.89-958,294.77-212,431.24

Finding the Fourth Proportional to 638,930.89, 958,294.77 and 212,431.24

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Solution

The fourth proportional to 638,930.89, 958,294.77 and 212,431.24 is: 318,613.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,930.89 : 958,294.77 = 212,431.24 : x
  2. Step 2: Convert to fraction form
    638,930.89/958,294.77 = 212,431.24/x
  3. Step 3: Cross multiply
    638,930.89x = 958,294.77 × 212,431.24
  4. Step 4: Simplify right side
    638,930.89x = 203,571,746,276.62
  5. Step 5: Solve for x
    x = 203,571,746,276.62/638,930.89
  6. Step 6: Final answer
    x = 318,613.09

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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.