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Finding the Fourth Proportional to 3,313.86, 4,572.90 and 1,986.90

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Solution

The fourth proportional to 3,313.86, 4,572.90 and 1,986.90 is: 2,741.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,313.86 : 4,572.90 = 1,986.90 : x
  2. Step 2: Convert to fraction form
    3,313.86/4,572.90 = 1,986.90/x
  3. Step 3: Cross multiply
    3,313.86x = 4,572.90 × 1,986.90
  4. Step 4: Simplify right side
    3,313.86x = 9,085,895.01
  5. Step 5: Solve for x
    x = 9,085,895.01/3,313.86
  6. Step 6: Final answer
    x = 2,741.79

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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.