Home / 3,111.22-4,666.83-921.59

Finding the Fourth Proportional to 3,111.22, 4,666.83 and 921.59

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Solution

The fourth proportional to 3,111.22, 4,666.83 and 921.59 is: 1,382.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,111.22 : 4,666.83 = 921.59 : x
  2. Step 2: Convert to fraction form
    3,111.22/4,666.83 = 921.59/x
  3. Step 3: Cross multiply
    3,111.22x = 4,666.83 × 921.59
  4. Step 4: Simplify right side
    3,111.22x = 4,300,903.86
  5. Step 5: Solve for x
    x = 4,300,903.86/3,111.22
  6. Step 6: Final answer
    x = 1,382.39

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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.