Home / 850.12-1,275.50-438.99

Finding the Fourth Proportional to 850.12, 1,275.50 and 438.99

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Solution

The fourth proportional to 850.12, 1,275.50 and 438.99 is: 658.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.12 : 1,275.50 = 438.99 : x
  2. Step 2: Convert to fraction form
    850.12/1,275.50 = 438.99/x
  3. Step 3: Cross multiply
    850.12x = 1,275.50 × 438.99
  4. Step 4: Simplify right side
    850.12x = 559,929.55
  5. Step 5: Solve for x
    x = 559,929.55/850.12
  6. Step 6: Final answer
    x = 658.65

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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.