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Finding the Fourth Proportional to 927.55, 1,391.07 and 634.99

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Solution

The fourth proportional to 927.55, 1,391.07 and 634.99 is: 952.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.55 : 1,391.07 = 634.99 : x
  2. Step 2: Convert to fraction form
    927.55/1,391.07 = 634.99/x
  3. Step 3: Cross multiply
    927.55x = 1,391.07 × 634.99
  4. Step 4: Simplify right side
    927.55x = 883,315.54
  5. Step 5: Solve for x
    x = 883,315.54/927.55
  6. Step 6: Final answer
    x = 952.31

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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.