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Finding the Fourth Proportional to 933.96, 1,290.50 and 768.04

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Solution

The fourth proportional to 933.96, 1,290.50 and 768.04 is: 1,061.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.96 : 1,290.50 = 768.04 : x
  2. Step 2: Convert to fraction form
    933.96/1,290.50 = 768.04/x
  3. Step 3: Cross multiply
    933.96x = 1,290.50 × 768.04
  4. Step 4: Simplify right side
    933.96x = 991,155.62
  5. Step 5: Solve for x
    x = 991,155.62/933.96
  6. Step 6: Final answer
    x = 1,061.24

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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.