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Finding the Fourth Proportional to 915.56, 1,371.07 and 622

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Solution

The fourth proportional to 915.56, 1,371.07 and 622 is: 931.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.56 : 1,371.07 = 622 : x
  2. Step 2: Convert to fraction form
    915.56/1,371.07 = 622/x
  3. Step 3: Cross multiply
    915.56x = 1,371.07 × 622
  4. Step 4: Simplify right side
    915.56x = 852,805.54
  5. Step 5: Solve for x
    x = 852,805.54/915.56
  6. Step 6: Final answer
    x = 931.46

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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.