Home / 1,410.12-2,112.44-921.69

Finding the Fourth Proportional to 1,410.12, 2,112.44 and 921.69

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Solution

The fourth proportional to 1,410.12, 2,112.44 and 921.69 is: 1,380.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,410.12 : 2,112.44 = 921.69 : x
  2. Step 2: Convert to fraction form
    1,410.12/2,112.44 = 921.69/x
  3. Step 3: Cross multiply
    1,410.12x = 2,112.44 × 921.69
  4. Step 4: Simplify right side
    1,410.12x = 1,947,014.82
  5. Step 5: Solve for x
    x = 1,947,014.82/1,410.12
  6. Step 6: Final answer
    x = 1,380.74

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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.