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Finding the Fourth Proportional to 275.13, 412.65 and 112.77

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Solution

The fourth proportional to 275.13, 412.65 and 112.77 is: 169.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.13 : 412.65 = 112.77 : x
  2. Step 2: Convert to fraction form
    275.13/412.65 = 112.77/x
  3. Step 3: Cross multiply
    275.13x = 412.65 × 112.77
  4. Step 4: Simplify right side
    275.13x = 46,534.54
  5. Step 5: Solve for x
    x = 46,534.54/275.13
  6. Step 6: Final answer
    x = 169.14

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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.