Home / 1,230.15-1,845.45-499.80

Finding the Fourth Proportional to 1,230.15, 1,845.45 and 499.80

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Solution

The fourth proportional to 1,230.15, 1,845.45 and 499.80 is: 749.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230.15 : 1,845.45 = 499.80 : x
  2. Step 2: Convert to fraction form
    1,230.15/1,845.45 = 499.80/x
  3. Step 3: Cross multiply
    1,230.15x = 1,845.45 × 499.80
  4. Step 4: Simplify right side
    1,230.15x = 922,355.91
  5. Step 5: Solve for x
    x = 922,355.91/1,230.15
  6. Step 6: Final answer
    x = 749.79

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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.