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Finding the Fourth Proportional to 1,273.26, 1,909.89 and 624.45

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Solution

The fourth proportional to 1,273.26, 1,909.89 and 624.45 is: 936.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,273.26 : 1,909.89 = 624.45 : x
  2. Step 2: Convert to fraction form
    1,273.26/1,909.89 = 624.45/x
  3. Step 3: Cross multiply
    1,273.26x = 1,909.89 × 624.45
  4. Step 4: Simplify right side
    1,273.26x = 1,192,630.81
  5. Step 5: Solve for x
    x = 1,192,630.81/1,273.26
  6. Step 6: Final answer
    x = 936.68

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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.