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Finding the Fourth Proportional to 933.79, 1,288.32 and 540.73

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Solution

The fourth proportional to 933.79, 1,288.32 and 540.73 is: 746.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.79 : 1,288.32 = 540.73 : x
  2. Step 2: Convert to fraction form
    933.79/1,288.32 = 540.73/x
  3. Step 3: Cross multiply
    933.79x = 1,288.32 × 540.73
  4. Step 4: Simplify right side
    933.79x = 696,633.27
  5. Step 5: Solve for x
    x = 696,633.27/933.79
  6. Step 6: Final answer
    x = 746.03

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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.