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Finding the Fourth Proportional to 2,485.12, 3,728.16 and 946

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Solution

The fourth proportional to 2,485.12, 3,728.16 and 946 is: 1,419.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,485.12 : 3,728.16 = 946 : x
  2. Step 2: Convert to fraction form
    2,485.12/3,728.16 = 946/x
  3. Step 3: Cross multiply
    2,485.12x = 3,728.16 × 946
  4. Step 4: Simplify right side
    2,485.12x = 3,526,839.36
  5. Step 5: Solve for x
    x = 3,526,839.36/2,485.12
  6. Step 6: Final answer
    x = 1,419.18

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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.