Home / 1,208.30-1,811.36-438.62

Finding the Fourth Proportional to 1,208.30, 1,811.36 and 438.62

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Solution

The fourth proportional to 1,208.30, 1,811.36 and 438.62 is: 657.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208.30 : 1,811.36 = 438.62 : x
  2. Step 2: Convert to fraction form
    1,208.30/1,811.36 = 438.62/x
  3. Step 3: Cross multiply
    1,208.30x = 1,811.36 × 438.62
  4. Step 4: Simplify right side
    1,208.30x = 794,498.72
  5. Step 5: Solve for x
    x = 794,498.72/1,208.30
  6. Step 6: Final answer
    x = 657.53

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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.