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Finding the Fourth Proportional to 1,340.53, 2,010.79 and 762.19

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Solution

The fourth proportional to 1,340.53, 2,010.79 and 762.19 is: 1,143.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,340.53 : 2,010.79 = 762.19 : x
  2. Step 2: Convert to fraction form
    1,340.53/2,010.79 = 762.19/x
  3. Step 3: Cross multiply
    1,340.53x = 2,010.79 × 762.19
  4. Step 4: Simplify right side
    1,340.53x = 1,532,599.96
  5. Step 5: Solve for x
    x = 1,532,599.96/1,340.53
  6. Step 6: Final answer
    x = 1,143.28

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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.