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Finding the Fourth Proportional to 1,441.68, 2,161.12 and 620.52

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Solution

The fourth proportional to 1,441.68, 2,161.12 and 620.52 is: 930.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,441.68 : 2,161.12 = 620.52 : x
  2. Step 2: Convert to fraction form
    1,441.68/2,161.12 = 620.52/x
  3. Step 3: Cross multiply
    1,441.68x = 2,161.12 × 620.52
  4. Step 4: Simplify right side
    1,441.68x = 1,341,018.18
  5. Step 5: Solve for x
    x = 1,341,018.18/1,441.68
  6. Step 6: Final answer
    x = 930.18

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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.