Home / 1,219.54-1,827.50-640.66

Finding the Fourth Proportional to 1,219.54, 1,827.50 and 640.66

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Solution

The fourth proportional to 1,219.54, 1,827.50 and 640.66 is: 960.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,219.54 : 1,827.50 = 640.66 : x
  2. Step 2: Convert to fraction form
    1,219.54/1,827.50 = 640.66/x
  3. Step 3: Cross multiply
    1,219.54x = 1,827.50 × 640.66
  4. Step 4: Simplify right side
    1,219.54x = 1,170,806.15
  5. Step 5: Solve for x
    x = 1,170,806.15/1,219.54
  6. Step 6: Final answer
    x = 960.04

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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.