Home / 1,813.48-2,720.28-1,321.39

Finding the Fourth Proportional to 1,813.48, 2,720.28 and 1,321.39

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Solution

The fourth proportional to 1,813.48, 2,720.28 and 1,321.39 is: 1,982.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,813.48 : 2,720.28 = 1,321.39 : x
  2. Step 2: Convert to fraction form
    1,813.48/2,720.28 = 1,321.39/x
  3. Step 3: Cross multiply
    1,813.48x = 2,720.28 × 1,321.39
  4. Step 4: Simplify right side
    1,813.48x = 3,594,550.79
  5. Step 5: Solve for x
    x = 3,594,550.79/1,813.48
  6. Step 6: Final answer
    x = 1,982.13

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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.