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Finding the Fourth Proportional to 1,144.51, 1,579.43 and 620.55

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Solution

The fourth proportional to 1,144.51, 1,579.43 and 620.55 is: 856.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,144.51 : 1,579.43 = 620.55 : x
  2. Step 2: Convert to fraction form
    1,144.51/1,579.43 = 620.55/x
  3. Step 3: Cross multiply
    1,144.51x = 1,579.43 × 620.55
  4. Step 4: Simplify right side
    1,144.51x = 980,115.29
  5. Step 5: Solve for x
    x = 980,115.29/1,144.51
  6. Step 6: Final answer
    x = 856.36

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