Home / 1,415.88-2,134.68-1,320.60

Finding the Fourth Proportional to 1,415.88, 2,134.68 and 1,320.60

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Solution

The fourth proportional to 1,415.88, 2,134.68 and 1,320.60 is: 1,991.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.88 : 2,134.68 = 1,320.60 : x
  2. Step 2: Convert to fraction form
    1,415.88/2,134.68 = 1,320.60/x
  3. Step 3: Cross multiply
    1,415.88x = 2,134.68 × 1,320.60
  4. Step 4: Simplify right side
    1,415.88x = 2,819,058.41
  5. Step 5: Solve for x
    x = 2,819,058.41/1,415.88
  6. Step 6: Final answer
    x = 1,991.03

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.