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Finding the Fourth Proportional to 1,270.86, 1,755.48 and 1,023.12

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Solution

The fourth proportional to 1,270.86, 1,755.48 and 1,023.12 is: 1,413.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,270.86 : 1,755.48 = 1,023.12 : x
  2. Step 2: Convert to fraction form
    1,270.86/1,755.48 = 1,023.12/x
  3. Step 3: Cross multiply
    1,270.86x = 1,755.48 × 1,023.12
  4. Step 4: Simplify right side
    1,270.86x = 1,796,066.70
  5. Step 5: Solve for x
    x = 1,796,066.70/1,270.86
  6. Step 6: Final answer
    x = 1,413.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.