Home / 1,208.04-1,811.18-385.85

Finding the Fourth Proportional to 1,208.04, 1,811.18 and 385.85

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Solution

The fourth proportional to 1,208.04, 1,811.18 and 385.85 is: 578.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208.04 : 1,811.18 = 385.85 : x
  2. Step 2: Convert to fraction form
    1,208.04/1,811.18 = 385.85/x
  3. Step 3: Cross multiply
    1,208.04x = 1,811.18 × 385.85
  4. Step 4: Simplify right side
    1,208.04x = 698,832.82
  5. Step 5: Solve for x
    x = 698,832.82/1,208.04
  6. Step 6: Final answer
    x = 578.48

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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.