Home / 1,245.51-1,867.77-423.56

Finding the Fourth Proportional to 1,245.51, 1,867.77 and 423.56

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Solution

The fourth proportional to 1,245.51, 1,867.77 and 423.56 is: 635.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.51 : 1,867.77 = 423.56 : x
  2. Step 2: Convert to fraction form
    1,245.51/1,867.77 = 423.56/x
  3. Step 3: Cross multiply
    1,245.51x = 1,867.77 × 423.56
  4. Step 4: Simplify right side
    1,245.51x = 791,117.33
  5. Step 5: Solve for x
    x = 791,117.33/1,245.51
  6. Step 6: Final answer
    x = 635.18

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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.