Home / 1,208.08-1,811.90-342.20

Finding the Fourth Proportional to 1,208.08, 1,811.90 and 342.20

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Solution

The fourth proportional to 1,208.08, 1,811.90 and 342.20 is: 513.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208.08 : 1,811.90 = 342.20 : x
  2. Step 2: Convert to fraction form
    1,208.08/1,811.90 = 342.20/x
  3. Step 3: Cross multiply
    1,208.08x = 1,811.90 × 342.20
  4. Step 4: Simplify right side
    1,208.08x = 620,032.18
  5. Step 5: Solve for x
    x = 620,032.18/1,208.08
  6. Step 6: Final answer
    x = 513.24

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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.