Home / 1,421.14-2,131.30-555.26

Finding the Fourth Proportional to 1,421.14, 2,131.30 and 555.26

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Solution

The fourth proportional to 1,421.14, 2,131.30 and 555.26 is: 832.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.14 : 2,131.30 = 555.26 : x
  2. Step 2: Convert to fraction form
    1,421.14/2,131.30 = 555.26/x
  3. Step 3: Cross multiply
    1,421.14x = 2,131.30 × 555.26
  4. Step 4: Simplify right side
    1,421.14x = 1,183,425.64
  5. Step 5: Solve for x
    x = 1,183,425.64/1,421.14
  6. Step 6: Final answer
    x = 832.73

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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.