Home / 1,938.30-2,905.47-1,242.96

Finding the Fourth Proportional to 1,938.30, 2,905.47 and 1,242.96

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Solution

The fourth proportional to 1,938.30, 2,905.47 and 1,242.96 is: 1,863.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.30 : 2,905.47 = 1,242.96 : x
  2. Step 2: Convert to fraction form
    1,938.30/2,905.47 = 1,242.96/x
  3. Step 3: Cross multiply
    1,938.30x = 2,905.47 × 1,242.96
  4. Step 4: Simplify right side
    1,938.30x = 3,611,382.99
  5. Step 5: Solve for x
    x = 3,611,382.99/1,938.30
  6. Step 6: Final answer
    x = 1,863.17

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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.