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Finding the Fourth Proportional to 1,400.43, 2,100.63 and 360.44

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Solution

The fourth proportional to 1,400.43, 2,100.63 and 360.44 is: 540.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.43 : 2,100.63 = 360.44 : x
  2. Step 2: Convert to fraction form
    1,400.43/2,100.63 = 360.44/x
  3. Step 3: Cross multiply
    1,400.43x = 2,100.63 × 360.44
  4. Step 4: Simplify right side
    1,400.43x = 757,140.57
  5. Step 5: Solve for x
    x = 757,140.57/1,400.43
  6. Step 6: Final answer
    x = 540.65

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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.