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Finding the Fourth Proportional to 1,145.82, 1,718.73 and 280.14

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Solution

The fourth proportional to 1,145.82, 1,718.73 and 280.14 is: 420.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.82 : 1,718.73 = 280.14 : x
  2. Step 2: Convert to fraction form
    1,145.82/1,718.73 = 280.14/x
  3. Step 3: Cross multiply
    1,145.82x = 1,718.73 × 280.14
  4. Step 4: Simplify right side
    1,145.82x = 481,485.02
  5. Step 5: Solve for x
    x = 481,485.02/1,145.82
  6. Step 6: Final answer
    x = 420.21

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.