Home / 1,619.82-2,235.36-921.18

Finding the Fourth Proportional to 1,619.82, 2,235.36 and 921.18

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Solution

The fourth proportional to 1,619.82, 2,235.36 and 921.18 is: 1,271.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,619.82 : 2,235.36 = 921.18 : x
  2. Step 2: Convert to fraction form
    1,619.82/2,235.36 = 921.18/x
  3. Step 3: Cross multiply
    1,619.82x = 2,235.36 × 921.18
  4. Step 4: Simplify right side
    1,619.82x = 2,059,168.92
  5. Step 5: Solve for x
    x = 2,059,168.92/1,619.82
  6. Step 6: Final answer
    x = 1,271.23

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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.