Home / 1,102.09-1,520.81-629.93

Finding the Fourth Proportional to 1,102.09, 1,520.81 and 629.93

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Solution

The fourth proportional to 1,102.09, 1,520.81 and 629.93 is: 869.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,102.09 : 1,520.81 = 629.93 : x
  2. Step 2: Convert to fraction form
    1,102.09/1,520.81 = 629.93/x
  3. Step 3: Cross multiply
    1,102.09x = 1,520.81 × 629.93
  4. Step 4: Simplify right side
    1,102.09x = 958,003.84
  5. Step 5: Solve for x
    x = 958,003.84/1,102.09
  6. Step 6: Final answer
    x = 869.26

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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.