Home / 1,985.28-2,977.86-1,119.60

Finding the Fourth Proportional to 1,985.28, 2,977.86 and 1,119.60

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Solution

The fourth proportional to 1,985.28, 2,977.86 and 1,119.60 is: 1,679.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.28 : 2,977.86 = 1,119.60 : x
  2. Step 2: Convert to fraction form
    1,985.28/2,977.86 = 1,119.60/x
  3. Step 3: Cross multiply
    1,985.28x = 2,977.86 × 1,119.60
  4. Step 4: Simplify right side
    1,985.28x = 3,334,012.06
  5. Step 5: Solve for x
    x = 3,334,012.06/1,985.28
  6. Step 6: Final answer
    x = 1,679.37

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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.