Home / 1,355.93-2,021.73-1,331.33

Finding the Fourth Proportional to 1,355.93, 2,021.73 and 1,331.33

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Solution

The fourth proportional to 1,355.93, 2,021.73 and 1,331.33 is: 1,985.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.93 : 2,021.73 = 1,331.33 : x
  2. Step 2: Convert to fraction form
    1,355.93/2,021.73 = 1,331.33/x
  3. Step 3: Cross multiply
    1,355.93x = 2,021.73 × 1,331.33
  4. Step 4: Simplify right side
    1,355.93x = 2,691,579.69
  5. Step 5: Solve for x
    x = 2,691,579.69/1,355.93
  6. Step 6: Final answer
    x = 1,985.05

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1.5x scale

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.