Home / 1,313.13-1,811.05-1,155.43

Finding the Fourth Proportional to 1,313.13, 1,811.05 and 1,155.43

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Solution

The fourth proportional to 1,313.13, 1,811.05 and 1,155.43 is: 1,593.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,313.13 : 1,811.05 = 1,155.43 : x
  2. Step 2: Convert to fraction form
    1,313.13/1,811.05 = 1,155.43/x
  3. Step 3: Cross multiply
    1,313.13x = 1,811.05 × 1,155.43
  4. Step 4: Simplify right side
    1,313.13x = 2,092,541.50
  5. Step 5: Solve for x
    x = 2,092,541.50/1,313.13
  6. Step 6: Final answer
    x = 1,593.55

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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.