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Finding the Fourth Proportional to 1,419.44, 2,129.54 and 495.05

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Solution

The fourth proportional to 1,419.44, 2,129.54 and 495.05 is: 742.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,419.44 : 2,129.54 = 495.05 : x
  2. Step 2: Convert to fraction form
    1,419.44/2,129.54 = 495.05/x
  3. Step 3: Cross multiply
    1,419.44x = 2,129.54 × 495.05
  4. Step 4: Simplify right side
    1,419.44x = 1,054,215.65
  5. Step 5: Solve for x
    x = 1,054,215.65/1,419.44
  6. Step 6: Final answer
    x = 742.70

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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.