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Finding the Fourth Proportional to 1,362.16, 1,879.77 and 741.16

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Solution

The fourth proportional to 1,362.16, 1,879.77 and 741.16 is: 1,022.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,362.16 : 1,879.77 = 741.16 : x
  2. Step 2: Convert to fraction form
    1,362.16/1,879.77 = 741.16/x
  3. Step 3: Cross multiply
    1,362.16x = 1,879.77 × 741.16
  4. Step 4: Simplify right side
    1,362.16x = 1,393,210.33
  5. Step 5: Solve for x
    x = 1,393,210.33/1,362.16
  6. Step 6: Final answer
    x = 1,022.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.