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Finding the Fourth Proportional to 1,305.88, 1,801.74 and 839.32

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Solution

The fourth proportional to 1,305.88, 1,801.74 and 839.32 is: 1,158.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,305.88 : 1,801.74 = 839.32 : x
  2. Step 2: Convert to fraction form
    1,305.88/1,801.74 = 839.32/x
  3. Step 3: Cross multiply
    1,305.88x = 1,801.74 × 839.32
  4. Step 4: Simplify right side
    1,305.88x = 1,512,236.42
  5. Step 5: Solve for x
    x = 1,512,236.42/1,305.88
  6. Step 6: Final answer
    x = 1,158.02

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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.