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Finding the Fourth Proportional to 1,682.74, 2,523.48 and 642.47

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Solution

The fourth proportional to 1,682.74, 2,523.48 and 642.47 is: 963.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,682.74 : 2,523.48 = 642.47 : x
  2. Step 2: Convert to fraction form
    1,682.74/2,523.48 = 642.47/x
  3. Step 3: Cross multiply
    1,682.74x = 2,523.48 × 642.47
  4. Step 4: Simplify right side
    1,682.74x = 1,621,257.62
  5. Step 5: Solve for x
    x = 1,621,257.62/1,682.74
  6. Step 6: Final answer
    x = 963.46

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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.