Home / 1,090.28-1,503.39-986.60

Finding the Fourth Proportional to 1,090.28, 1,503.39 and 986.60

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Solution

The fourth proportional to 1,090.28, 1,503.39 and 986.60 is: 1,360.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,090.28 : 1,503.39 = 986.60 : x
  2. Step 2: Convert to fraction form
    1,090.28/1,503.39 = 986.60/x
  3. Step 3: Cross multiply
    1,090.28x = 1,503.39 × 986.60
  4. Step 4: Simplify right side
    1,090.28x = 1,483,244.57
  5. Step 5: Solve for x
    x = 1,483,244.57/1,090.28
  6. Step 6: Final answer
    x = 1,360.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.