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Finding the Fourth Proportional to 927.51, 1,391.73 and 440.56

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Solution

The fourth proportional to 927.51, 1,391.73 and 440.56 is: 661.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.51 : 1,391.73 = 440.56 : x
  2. Step 2: Convert to fraction form
    927.51/1,391.73 = 440.56/x
  3. Step 3: Cross multiply
    927.51x = 1,391.73 × 440.56
  4. Step 4: Simplify right side
    927.51x = 613,140.57
  5. Step 5: Solve for x
    x = 613,140.57/927.51
  6. Step 6: Final answer
    x = 661.06

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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.