Home / 1,805.21-2,487.23-1,214.72

Finding the Fourth Proportional to 1,805.21, 2,487.23 and 1,214.72

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Solution

The fourth proportional to 1,805.21, 2,487.23 and 1,214.72 is: 1,673.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,805.21 : 2,487.23 = 1,214.72 : x
  2. Step 2: Convert to fraction form
    1,805.21/2,487.23 = 1,214.72/x
  3. Step 3: Cross multiply
    1,805.21x = 2,487.23 × 1,214.72
  4. Step 4: Simplify right side
    1,805.21x = 3,021,275.73
  5. Step 5: Solve for x
    x = 3,021,275.73/1,805.21
  6. Step 6: Final answer
    x = 1,673.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.