Home / 1,245.77-1,868.84-423.81

Finding the Fourth Proportional to 1,245.77, 1,868.84 and 423.81

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Solution

The fourth proportional to 1,245.77, 1,868.84 and 423.81 is: 635.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.77 : 1,868.84 = 423.81 : x
  2. Step 2: Convert to fraction form
    1,245.77/1,868.84 = 423.81/x
  3. Step 3: Cross multiply
    1,245.77x = 1,868.84 × 423.81
  4. Step 4: Simplify right side
    1,245.77x = 792,030.96
  5. Step 5: Solve for x
    x = 792,030.96/1,245.77
  6. Step 6: Final answer
    x = 635.78

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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.