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Finding the Fourth Proportional to 1,446.40, 2,169.78 and 624.34

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Solution

The fourth proportional to 1,446.40, 2,169.78 and 624.34 is: 936.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,446.40 : 2,169.78 = 624.34 : x
  2. Step 2: Convert to fraction form
    1,446.40/2,169.78 = 624.34/x
  3. Step 3: Cross multiply
    1,446.40x = 2,169.78 × 624.34
  4. Step 4: Simplify right side
    1,446.40x = 1,354,680.45
  5. Step 5: Solve for x
    x = 1,354,680.45/1,446.40
  6. Step 6: Final answer
    x = 936.59

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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.