Home / 3,111.24-4,666.44-920.20

Finding the Fourth Proportional to 3,111.24, 4,666.44 and 920.20

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Solution

The fourth proportional to 3,111.24, 4,666.44 and 920.20 is: 1,380.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,111.24 : 4,666.44 = 920.20 : x
  2. Step 2: Convert to fraction form
    3,111.24/4,666.44 = 920.20/x
  3. Step 3: Cross multiply
    3,111.24x = 4,666.44 × 920.20
  4. Step 4: Simplify right side
    3,111.24x = 4,294,058.09
  5. Step 5: Solve for x
    x = 4,294,058.09/3,111.24
  6. Step 6: Final answer
    x = 1,380.18

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1.5x scale

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.