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Finding the Fourth Proportional to 1,362.15, 2,040.65 and 805.19

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Solution

The fourth proportional to 1,362.15, 2,040.65 and 805.19 is: 1,206.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,362.15 : 2,040.65 = 805.19 : x
  2. Step 2: Convert to fraction form
    1,362.15/2,040.65 = 805.19/x
  3. Step 3: Cross multiply
    1,362.15x = 2,040.65 × 805.19
  4. Step 4: Simplify right side
    1,362.15x = 1,643,119.25
  5. Step 5: Solve for x
    x = 1,643,119.25/1,362.15
  6. Step 6: Final answer
    x = 1,206.27

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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.