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Finding the Fourth Proportional to 1,089.30, 1,634.64 and 627.99

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Solution

The fourth proportional to 1,089.30, 1,634.64 and 627.99 is: 942.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.30 : 1,634.64 = 627.99 : x
  2. Step 2: Convert to fraction form
    1,089.30/1,634.64 = 627.99/x
  3. Step 3: Cross multiply
    1,089.30x = 1,634.64 × 627.99
  4. Step 4: Simplify right side
    1,089.30x = 1,026,537.57
  5. Step 5: Solve for x
    x = 1,026,537.57/1,089.30
  6. Step 6: Final answer
    x = 942.38

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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.