Home / 1,089.60-1,635.36-629.04

Finding the Fourth Proportional to 1,089.60, 1,635.36 and 629.04

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Solution

The fourth proportional to 1,089.60, 1,635.36 and 629.04 is: 944.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.60 : 1,635.36 = 629.04 : x
  2. Step 2: Convert to fraction form
    1,089.60/1,635.36 = 629.04/x
  3. Step 3: Cross multiply
    1,089.60x = 1,635.36 × 629.04
  4. Step 4: Simplify right side
    1,089.60x = 1,028,706.85
  5. Step 5: Solve for x
    x = 1,028,706.85/1,089.60
  6. Step 6: Final answer
    x = 944.11

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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.