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Finding the Fourth Proportional to 1,573.14, 2,361.96 and 990.57

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Solution

The fourth proportional to 1,573.14, 2,361.96 and 990.57 is: 1,487.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,573.14 : 2,361.96 = 990.57 : x
  2. Step 2: Convert to fraction form
    1,573.14/2,361.96 = 990.57/x
  3. Step 3: Cross multiply
    1,573.14x = 2,361.96 × 990.57
  4. Step 4: Simplify right side
    1,573.14x = 2,339,686.72
  5. Step 5: Solve for x
    x = 2,339,686.72/1,573.14
  6. Step 6: Final answer
    x = 1,487.27

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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.