Home / 1,431.56-2,145.72-1,415.36

Finding the Fourth Proportional to 1,431.56, 2,145.72 and 1,415.36

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Solution

The fourth proportional to 1,431.56, 2,145.72 and 1,415.36 is: 2,121.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.56 : 2,145.72 = 1,415.36 : x
  2. Step 2: Convert to fraction form
    1,431.56/2,145.72 = 1,415.36/x
  3. Step 3: Cross multiply
    1,431.56x = 2,145.72 × 1,415.36
  4. Step 4: Simplify right side
    1,431.56x = 3,036,966.26
  5. Step 5: Solve for x
    x = 3,036,966.26/1,431.56
  6. Step 6: Final answer
    x = 2,121.44

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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.