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Finding the Fourth Proportional to 1,274.99, 1,912.41 and 625.50

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Solution

The fourth proportional to 1,274.99, 1,912.41 and 625.50 is: 938.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,274.99 : 1,912.41 = 625.50 : x
  2. Step 2: Convert to fraction form
    1,274.99/1,912.41 = 625.50/x
  3. Step 3: Cross multiply
    1,274.99x = 1,912.41 × 625.50
  4. Step 4: Simplify right side
    1,274.99x = 1,196,212.46
  5. Step 5: Solve for x
    x = 1,196,212.46/1,274.99
  6. Step 6: Final answer
    x = 938.22

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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.