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Finding the Fourth Proportional to 1,474.74, 2,212.79 and 744.80

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Solution

The fourth proportional to 1,474.74, 2,212.79 and 744.80 is: 1,117.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,474.74 : 2,212.79 = 744.80 : x
  2. Step 2: Convert to fraction form
    1,474.74/2,212.79 = 744.80/x
  3. Step 3: Cross multiply
    1,474.74x = 2,212.79 × 744.80
  4. Step 4: Simplify right side
    1,474.74x = 1,648,071.20
  5. Step 5: Solve for x
    x = 1,648,071.20/1,474.74
  6. Step 6: Final answer
    x = 1,117.53

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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.