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Finding the Fourth Proportional to 1,518, 2,275.22 and 640.32

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Solution

The fourth proportional to 1,518, 2,275.22 and 640.32 is: 959.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,518 : 2,275.22 = 640.32 : x
  2. Step 2: Convert to fraction form
    1,518/2,275.22 = 640.32/x
  3. Step 3: Cross multiply
    1,518x = 2,275.22 × 640.32
  4. Step 4: Simplify right side
    1,518x = 1,456,868.87
  5. Step 5: Solve for x
    x = 1,456,868.87/1,518
  6. Step 6: Final answer
    x = 959.73

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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.