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Finding the Fourth Proportional to 949.49, 1,415.19 and 931.27

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Solution

The fourth proportional to 949.49, 1,415.19 and 931.27 is: 1,388.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.49 : 1,415.19 = 931.27 : x
  2. Step 2: Convert to fraction form
    949.49/1,415.19 = 931.27/x
  3. Step 3: Cross multiply
    949.49x = 1,415.19 × 931.27
  4. Step 4: Simplify right side
    949.49x = 1,317,912.26
  5. Step 5: Solve for x
    x = 1,317,912.26/949.49
  6. Step 6: Final answer
    x = 1,388.02

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.