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Finding the Fourth Proportional to 1,418.94, 1,953.26 and 1,229.82

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Solution

The fourth proportional to 1,418.94, 1,953.26 and 1,229.82 is: 1,692.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.94 : 1,953.26 = 1,229.82 : x
  2. Step 2: Convert to fraction form
    1,418.94/1,953.26 = 1,229.82/x
  3. Step 3: Cross multiply
    1,418.94x = 1,953.26 × 1,229.82
  4. Step 4: Simplify right side
    1,418.94x = 2,402,158.21
  5. Step 5: Solve for x
    x = 2,402,158.21/1,418.94
  6. Step 6: Final answer
    x = 1,692.92

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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.