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Finding the Fourth Proportional to 1,426.88, 1,969.08 and 837.84

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Solution

The fourth proportional to 1,426.88, 1,969.08 and 837.84 is: 1,156.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.88 : 1,969.08 = 837.84 : x
  2. Step 2: Convert to fraction form
    1,426.88/1,969.08 = 837.84/x
  3. Step 3: Cross multiply
    1,426.88x = 1,969.08 × 837.84
  4. Step 4: Simplify right side
    1,426.88x = 1,649,773.99
  5. Step 5: Solve for x
    x = 1,649,773.99/1,426.88
  6. Step 6: Final answer
    x = 1,156.21

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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.