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Finding the Fourth Proportional to 1,274.93, 1,911.94 and 494.67

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Solution

The fourth proportional to 1,274.93, 1,911.94 and 494.67 is: 741.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,274.93 : 1,911.94 = 494.67 : x
  2. Step 2: Convert to fraction form
    1,274.93/1,911.94 = 494.67/x
  3. Step 3: Cross multiply
    1,274.93x = 1,911.94 × 494.67
  4. Step 4: Simplify right side
    1,274.93x = 945,779.36
  5. Step 5: Solve for x
    x = 945,779.36/1,274.93
  6. Step 6: Final answer
    x = 741.83

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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.