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Finding the Fourth Proportional to 1,245.39, 1,869.24 and 629.53

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Solution

The fourth proportional to 1,245.39, 1,869.24 and 629.53 is: 944.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.39 : 1,869.24 = 629.53 : x
  2. Step 2: Convert to fraction form
    1,245.39/1,869.24 = 629.53/x
  3. Step 3: Cross multiply
    1,245.39x = 1,869.24 × 629.53
  4. Step 4: Simplify right side
    1,245.39x = 1,176,742.66
  5. Step 5: Solve for x
    x = 1,176,742.66/1,245.39
  6. Step 6: Final answer
    x = 944.88

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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.