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Finding the Fourth Proportional to 860.93, 1,290.77 and 275.74

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Solution

The fourth proportional to 860.93, 1,290.77 and 275.74 is: 413.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.93 : 1,290.77 = 275.74 : x
  2. Step 2: Convert to fraction form
    860.93/1,290.77 = 275.74/x
  3. Step 3: Cross multiply
    860.93x = 1,290.77 × 275.74
  4. Step 4: Simplify right side
    860.93x = 355,913.35
  5. Step 5: Solve for x
    x = 355,913.35/860.93
  6. Step 6: Final answer
    x = 413.41

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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.