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Finding the Fourth Proportional to 1,642.72, 2,464.58 and 717.84

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Solution

The fourth proportional to 1,642.72, 2,464.58 and 717.84 is: 1,076.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,642.72 : 2,464.58 = 717.84 : x
  2. Step 2: Convert to fraction form
    1,642.72/2,464.58 = 717.84/x
  3. Step 3: Cross multiply
    1,642.72x = 2,464.58 × 717.84
  4. Step 4: Simplify right side
    1,642.72x = 1,769,174.11
  5. Step 5: Solve for x
    x = 1,769,174.11/1,642.72
  6. Step 6: Final answer
    x = 1,076.98

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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.