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Finding the Fourth Proportional to 1,792.56, 2,688.84 and 638.31

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Solution

The fourth proportional to 1,792.56, 2,688.84 and 638.31 is: 957.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,792.56 : 2,688.84 = 638.31 : x
  2. Step 2: Convert to fraction form
    1,792.56/2,688.84 = 638.31/x
  3. Step 3: Cross multiply
    1,792.56x = 2,688.84 × 638.31
  4. Step 4: Simplify right side
    1,792.56x = 1,716,313.46
  5. Step 5: Solve for x
    x = 1,716,313.46/1,792.56
  6. Step 6: Final answer
    x = 957.47

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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.