Home / 1,420.22-2,131.08-543.32

Finding the Fourth Proportional to 1,420.22, 2,131.08 and 543.32

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Solution

The fourth proportional to 1,420.22, 2,131.08 and 543.32 is: 815.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.22 : 2,131.08 = 543.32 : x
  2. Step 2: Convert to fraction form
    1,420.22/2,131.08 = 543.32/x
  3. Step 3: Cross multiply
    1,420.22x = 2,131.08 × 543.32
  4. Step 4: Simplify right side
    1,420.22x = 1,157,858.39
  5. Step 5: Solve for x
    x = 1,157,858.39/1,420.22
  6. Step 6: Final answer
    x = 815.27

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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.