Home / 1,187.08-1,629.45-1,083.40

Finding the Fourth Proportional to 1,187.08, 1,629.45 and 1,083.40

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Solution

The fourth proportional to 1,187.08, 1,629.45 and 1,083.40 is: 1,487.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187.08 : 1,629.45 = 1,083.40 : x
  2. Step 2: Convert to fraction form
    1,187.08/1,629.45 = 1,083.40/x
  3. Step 3: Cross multiply
    1,187.08x = 1,629.45 × 1,083.40
  4. Step 4: Simplify right side
    1,187.08x = 1,765,346.13
  5. Step 5: Solve for x
    x = 1,765,346.13/1,187.08
  6. Step 6: Final answer
    x = 1,487.13

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.