Home / 1,439.78-2,157.84-1,323.14

Finding the Fourth Proportional to 1,439.78, 2,157.84 and 1,323.14

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Solution

The fourth proportional to 1,439.78, 2,157.84 and 1,323.14 is: 1,983.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.78 : 2,157.84 = 1,323.14 : x
  2. Step 2: Convert to fraction form
    1,439.78/2,157.84 = 1,323.14/x
  3. Step 3: Cross multiply
    1,439.78x = 2,157.84 × 1,323.14
  4. Step 4: Simplify right side
    1,439.78x = 2,855,113.63
  5. Step 5: Solve for x
    x = 2,855,113.63/1,439.78
  6. Step 6: Final answer
    x = 1,983.03

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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.