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Finding the Fourth Proportional to 1,633.42, 2,448.15 and 645.31

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Solution

The fourth proportional to 1,633.42, 2,448.15 and 645.31 is: 967.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,633.42 : 2,448.15 = 645.31 : x
  2. Step 2: Convert to fraction form
    1,633.42/2,448.15 = 645.31/x
  3. Step 3: Cross multiply
    1,633.42x = 2,448.15 × 645.31
  4. Step 4: Simplify right side
    1,633.42x = 1,579,815.68
  5. Step 5: Solve for x
    x = 1,579,815.68/1,633.42
  6. Step 6: Final answer
    x = 967.18

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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.