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Finding the Fourth Proportional to 1,383.84, 2,074.01 and 651.83

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Solution

The fourth proportional to 1,383.84, 2,074.01 and 651.83 is: 976.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383.84 : 2,074.01 = 651.83 : x
  2. Step 2: Convert to fraction form
    1,383.84/2,074.01 = 651.83/x
  3. Step 3: Cross multiply
    1,383.84x = 2,074.01 × 651.83
  4. Step 4: Simplify right side
    1,383.84x = 1,351,888.31
  5. Step 5: Solve for x
    x = 1,351,888.31/1,383.84
  6. Step 6: Final answer
    x = 976.91

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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.