Home / 1,420.14-2,131.14-986.52

Finding the Fourth Proportional to 1,420.14, 2,131.14 and 986.52

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Solution

The fourth proportional to 1,420.14, 2,131.14 and 986.52 is: 1,480.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.14 : 2,131.14 = 986.52 : x
  2. Step 2: Convert to fraction form
    1,420.14/2,131.14 = 986.52/x
  3. Step 3: Cross multiply
    1,420.14x = 2,131.14 × 986.52
  4. Step 4: Simplify right side
    1,420.14x = 2,102,412.23
  5. Step 5: Solve for x
    x = 2,102,412.23/1,420.14
  6. Step 6: Final answer
    x = 1,480.43

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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.