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Finding the Fourth Proportional to 926.25, 1,278.39 and 610.95

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Solution

The fourth proportional to 926.25, 1,278.39 and 610.95 is: 843.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.25 : 1,278.39 = 610.95 : x
  2. Step 2: Convert to fraction form
    926.25/1,278.39 = 610.95/x
  3. Step 3: Cross multiply
    926.25x = 1,278.39 × 610.95
  4. Step 4: Simplify right side
    926.25x = 781,032.37
  5. Step 5: Solve for x
    x = 781,032.37/926.25
  6. Step 6: Final answer
    x = 843.22

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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.