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Finding the Fourth Proportional to 645.13, 966.94 and 298.51

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Solution

The fourth proportional to 645.13, 966.94 and 298.51 is: 447.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.13 : 966.94 = 298.51 : x
  2. Step 2: Convert to fraction form
    645.13/966.94 = 298.51/x
  3. Step 3: Cross multiply
    645.13x = 966.94 × 298.51
  4. Step 4: Simplify right side
    645.13x = 288,641.26
  5. Step 5: Solve for x
    x = 288,641.26/645.13
  6. Step 6: Final answer
    x = 447.42

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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.