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Finding the Fourth Proportional to 933.62, 1,405.30 and 792.68

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Solution

The fourth proportional to 933.62, 1,405.30 and 792.68 is: 1,193.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.62 : 1,405.30 = 792.68 : x
  2. Step 2: Convert to fraction form
    933.62/1,405.30 = 792.68/x
  3. Step 3: Cross multiply
    933.62x = 1,405.30 × 792.68
  4. Step 4: Simplify right side
    933.62x = 1,113,949.24
  5. Step 5: Solve for x
    x = 1,113,949.24/933.62
  6. Step 6: Final answer
    x = 1,193.15

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.