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Finding the Fourth Proportional to 1,274.32, 1,911.48 and 494.09

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Solution

The fourth proportional to 1,274.32, 1,911.48 and 494.09 is: 741.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,274.32 : 1,911.48 = 494.09 : x
  2. Step 2: Convert to fraction form
    1,274.32/1,911.48 = 494.09/x
  3. Step 3: Cross multiply
    1,274.32x = 1,911.48 × 494.09
  4. Step 4: Simplify right side
    1,274.32x = 944,443.15
  5. Step 5: Solve for x
    x = 944,443.15/1,274.32
  6. Step 6: Final answer
    x = 741.14

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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.