Home / 1,809.48-2,498.40-1,111.80

Finding the Fourth Proportional to 1,809.48, 2,498.40 and 1,111.80

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Solution

The fourth proportional to 1,809.48, 2,498.40 and 1,111.80 is: 1,535.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,809.48 : 2,498.40 = 1,111.80 : x
  2. Step 2: Convert to fraction form
    1,809.48/2,498.40 = 1,111.80/x
  3. Step 3: Cross multiply
    1,809.48x = 2,498.40 × 1,111.80
  4. Step 4: Simplify right side
    1,809.48x = 2,777,721.12
  5. Step 5: Solve for x
    x = 2,777,721.12/1,809.48
  6. Step 6: Final answer
    x = 1,535.09

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1.5x scale

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.