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Finding the Fourth Proportional to 1,368.66, 2,040.81 and 1,351.65

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Solution

The fourth proportional to 1,368.66, 2,040.81 and 1,351.65 is: 2,015.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368.66 : 2,040.81 = 1,351.65 : x
  2. Step 2: Convert to fraction form
    1,368.66/2,040.81 = 1,351.65/x
  3. Step 3: Cross multiply
    1,368.66x = 2,040.81 × 1,351.65
  4. Step 4: Simplify right side
    1,368.66x = 2,758,460.84
  5. Step 5: Solve for x
    x = 2,758,460.84/1,368.66
  6. Step 6: Final answer
    x = 2,015.45

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.