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Finding the Fourth Proportional to 921.43, 1,273.19 and 736.45

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Solution

The fourth proportional to 921.43, 1,273.19 and 736.45 is: 1,017.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    921.43 : 1,273.19 = 736.45 : x
  2. Step 2: Convert to fraction form
    921.43/1,273.19 = 736.45/x
  3. Step 3: Cross multiply
    921.43x = 1,273.19 × 736.45
  4. Step 4: Simplify right side
    921.43x = 937,640.81
  5. Step 5: Solve for x
    x = 937,640.81/921.43
  6. Step 6: Final answer
    x = 1,017.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.