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Finding the Fourth Proportional to 1,642.07, 2,464.02 and 1,425.20

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Solution

The fourth proportional to 1,642.07, 2,464.02 and 1,425.20 is: 2,138.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,642.07 : 2,464.02 = 1,425.20 : x
  2. Step 2: Convert to fraction form
    1,642.07/2,464.02 = 1,425.20/x
  3. Step 3: Cross multiply
    1,642.07x = 2,464.02 × 1,425.20
  4. Step 4: Simplify right side
    1,642.07x = 3,511,708.98
  5. Step 5: Solve for x
    x = 3,511,708.98/1,642.07
  6. Step 6: Final answer
    x = 2,138.58

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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.