Home / 1,442.12-2,163.72-620.60

Finding the Fourth Proportional to 1,442.12, 2,163.72 and 620.60

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Solution

The fourth proportional to 1,442.12, 2,163.72 and 620.60 is: 931.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,442.12 : 2,163.72 = 620.60 : x
  2. Step 2: Convert to fraction form
    1,442.12/2,163.72 = 620.60/x
  3. Step 3: Cross multiply
    1,442.12x = 2,163.72 × 620.60
  4. Step 4: Simplify right side
    1,442.12x = 1,342,804.63
  5. Step 5: Solve for x
    x = 1,342,804.63/1,442.12
  6. Step 6: Final answer
    x = 931.13

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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.