Home / 1,259.74-1,880.36-1,111.95

Finding the Fourth Proportional to 1,259.74, 1,880.36 and 1,111.95

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Solution

The fourth proportional to 1,259.74, 1,880.36 and 1,111.95 is: 1,659.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,259.74 : 1,880.36 = 1,111.95 : x
  2. Step 2: Convert to fraction form
    1,259.74/1,880.36 = 1,111.95/x
  3. Step 3: Cross multiply
    1,259.74x = 1,880.36 × 1,111.95
  4. Step 4: Simplify right side
    1,259.74x = 2,090,866.30
  5. Step 5: Solve for x
    x = 2,090,866.30/1,259.74
  6. Step 6: Final answer
    x = 1,659.76

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.