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Finding the Fourth Proportional to 933.44, 1,400.21 and 660.75

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Solution

The fourth proportional to 933.44, 1,400.21 and 660.75 is: 991.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.44 : 1,400.21 = 660.75 : x
  2. Step 2: Convert to fraction form
    933.44/1,400.21 = 660.75/x
  3. Step 3: Cross multiply
    933.44x = 1,400.21 × 660.75
  4. Step 4: Simplify right side
    933.44x = 925,188.76
  5. Step 5: Solve for x
    x = 925,188.76/933.44
  6. Step 6: Final answer
    x = 991.16

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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.