Home / 1,814.19-2,720.47-840.57

Finding the Fourth Proportional to 1,814.19, 2,720.47 and 840.57

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Solution

The fourth proportional to 1,814.19, 2,720.47 and 840.57 is: 1,260.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,814.19 : 2,720.47 = 840.57 : x
  2. Step 2: Convert to fraction form
    1,814.19/2,720.47 = 840.57/x
  3. Step 3: Cross multiply
    1,814.19x = 2,720.47 × 840.57
  4. Step 4: Simplify right side
    1,814.19x = 2,286,745.47
  5. Step 5: Solve for x
    x = 2,286,745.47/1,814.19
  6. Step 6: Final answer
    x = 1,260.48

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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.