Home / 1,969.40-2,717.01-1,129.80

Finding the Fourth Proportional to 1,969.40, 2,717.01 and 1,129.80

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Solution

The fourth proportional to 1,969.40, 2,717.01 and 1,129.80 is: 1,558.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,969.40 : 2,717.01 = 1,129.80 : x
  2. Step 2: Convert to fraction form
    1,969.40/2,717.01 = 1,129.80/x
  3. Step 3: Cross multiply
    1,969.40x = 2,717.01 × 1,129.80
  4. Step 4: Simplify right side
    1,969.40x = 3,069,677.90
  5. Step 5: Solve for x
    x = 3,069,677.90/1,969.40
  6. Step 6: Final answer
    x = 1,558.69

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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.