Home / 1,230.81-1,845.59-408.80

Finding the Fourth Proportional to 1,230.81, 1,845.59 and 408.80

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Solution

The fourth proportional to 1,230.81, 1,845.59 and 408.80 is: 612.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230.81 : 1,845.59 = 408.80 : x
  2. Step 2: Convert to fraction form
    1,230.81/1,845.59 = 408.80/x
  3. Step 3: Cross multiply
    1,230.81x = 1,845.59 × 408.80
  4. Step 4: Simplify right side
    1,230.81x = 754,465.92
  5. Step 5: Solve for x
    x = 754,465.92/1,230.81
  6. Step 6: Final answer
    x = 612.98

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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.