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Finding the Fourth Proportional to 1,350.72, 2,025.24 and 620.40

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Solution

The fourth proportional to 1,350.72, 2,025.24 and 620.40 is: 930.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,350.72 : 2,025.24 = 620.40 : x
  2. Step 2: Convert to fraction form
    1,350.72/2,025.24 = 620.40/x
  3. Step 3: Cross multiply
    1,350.72x = 2,025.24 × 620.40
  4. Step 4: Simplify right side
    1,350.72x = 1,256,458.90
  5. Step 5: Solve for x
    x = 1,256,458.90/1,350.72
  6. Step 6: Final answer
    x = 930.21

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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.