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Finding the Fourth Proportional to 371.22, 556.59 and 140.10

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Solution

The fourth proportional to 371.22, 556.59 and 140.10 is: 210.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.22 : 556.59 = 140.10 : x
  2. Step 2: Convert to fraction form
    371.22/556.59 = 140.10/x
  3. Step 3: Cross multiply
    371.22x = 556.59 × 140.10
  4. Step 4: Simplify right side
    371.22x = 77,978.26
  5. Step 5: Solve for x
    x = 77,978.26/371.22
  6. Step 6: Final answer
    x = 210.06

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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.