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Finding the Fourth Proportional to 1,113.89, 1,672.36 and 627.28

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Solution

The fourth proportional to 1,113.89, 1,672.36 and 627.28 is: 941.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,113.89 : 1,672.36 = 627.28 : x
  2. Step 2: Convert to fraction form
    1,113.89/1,672.36 = 627.28/x
  3. Step 3: Cross multiply
    1,113.89x = 1,672.36 × 627.28
  4. Step 4: Simplify right side
    1,113.89x = 1,049,032.23
  5. Step 5: Solve for x
    x = 1,049,032.23/1,113.89
  6. Step 6: Final answer
    x = 941.78

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.