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Finding the Fourth Proportional to 933.13, 1,396.74 and 620.16

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Solution

The fourth proportional to 933.13, 1,396.74 and 620.16 is: 928.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.13 : 1,396.74 = 620.16 : x
  2. Step 2: Convert to fraction form
    933.13/1,396.74 = 620.16/x
  3. Step 3: Cross multiply
    933.13x = 1,396.74 × 620.16
  4. Step 4: Simplify right side
    933.13x = 866,199.95
  5. Step 5: Solve for x
    x = 866,199.95/933.13
  6. Step 6: Final answer
    x = 928.27

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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.