Home / 1,245.10-1,867.62-505.06

Finding the Fourth Proportional to 1,245.10, 1,867.62 and 505.06

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Solution

The fourth proportional to 1,245.10, 1,867.62 and 505.06 is: 757.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.10 : 1,867.62 = 505.06 : x
  2. Step 2: Convert to fraction form
    1,245.10/1,867.62 = 505.06/x
  3. Step 3: Cross multiply
    1,245.10x = 1,867.62 × 505.06
  4. Step 4: Simplify right side
    1,245.10x = 943,260.16
  5. Step 5: Solve for x
    x = 943,260.16/1,245.10
  6. Step 6: Final answer
    x = 757.58

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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.