Home / 1,245.85-1,868.34-505.25

Finding the Fourth Proportional to 1,245.85, 1,868.34 and 505.25

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Solution

The fourth proportional to 1,245.85, 1,868.34 and 505.25 is: 757.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.85 : 1,868.34 = 505.25 : x
  2. Step 2: Convert to fraction form
    1,245.85/1,868.34 = 505.25/x
  3. Step 3: Cross multiply
    1,245.85x = 1,868.34 × 505.25
  4. Step 4: Simplify right side
    1,245.85x = 943,978.79
  5. Step 5: Solve for x
    x = 943,978.79/1,245.85
  6. Step 6: Final answer
    x = 757.70

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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.