Home / 1,208.50-1,812.75-439.18

Finding the Fourth Proportional to 1,208.50, 1,812.75 and 439.18

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Solution

The fourth proportional to 1,208.50, 1,812.75 and 439.18 is: 658.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208.50 : 1,812.75 = 439.18 : x
  2. Step 2: Convert to fraction form
    1,208.50/1,812.75 = 439.18/x
  3. Step 3: Cross multiply
    1,208.50x = 1,812.75 × 439.18
  4. Step 4: Simplify right side
    1,208.50x = 796,123.55
  5. Step 5: Solve for x
    x = 796,123.55/1,208.50
  6. Step 6: Final answer
    x = 658.77

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Double scale
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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.