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Finding the Fourth Proportional to 275.18, 412.63 and 92.51

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Solution

The fourth proportional to 275.18, 412.63 and 92.51 is: 138.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.18 : 412.63 = 92.51 : x
  2. Step 2: Convert to fraction form
    275.18/412.63 = 92.51/x
  3. Step 3: Cross multiply
    275.18x = 412.63 × 92.51
  4. Step 4: Simplify right side
    275.18x = 38,172.40
  5. Step 5: Solve for x
    x = 38,172.40/275.18
  6. Step 6: Final answer
    x = 138.72

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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.