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Finding the Fourth Proportional to 275.06, 412.75 and 143.30

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Solution

The fourth proportional to 275.06, 412.75 and 143.30 is: 215.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.06 : 412.75 = 143.30 : x
  2. Step 2: Convert to fraction form
    275.06/412.75 = 143.30/x
  3. Step 3: Cross multiply
    275.06x = 412.75 × 143.30
  4. Step 4: Simplify right side
    275.06x = 59,145.01
  5. Step 5: Solve for x
    x = 59,145.01/275.06
  6. Step 6: Final answer
    x = 215.03

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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.