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Finding the Fourth Proportional to 1,704.90, 2,352.09 and 986.61

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Solution

The fourth proportional to 1,704.90, 2,352.09 and 986.61 is: 1,361.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,704.90 : 2,352.09 = 986.61 : x
  2. Step 2: Convert to fraction form
    1,704.90/2,352.09 = 986.61/x
  3. Step 3: Cross multiply
    1,704.90x = 2,352.09 × 986.61
  4. Step 4: Simplify right side
    1,704.90x = 2,320,595.51
  5. Step 5: Solve for x
    x = 2,320,595.51/1,704.90
  6. Step 6: Final answer
    x = 1,361.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.