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Finding the Fourth Proportional to 2,796.35, 3,859.11 and 1,678.08

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Solution

The fourth proportional to 2,796.35, 3,859.11 and 1,678.08 is: 2,315.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,796.35 : 3,859.11 = 1,678.08 : x
  2. Step 2: Convert to fraction form
    2,796.35/3,859.11 = 1,678.08/x
  3. Step 3: Cross multiply
    2,796.35x = 3,859.11 × 1,678.08
  4. Step 4: Simplify right side
    2,796.35x = 6,475,895.31
  5. Step 5: Solve for x
    x = 6,475,895.31/2,796.35
  6. Step 6: Final answer
    x = 2,315.84

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1.5x scale

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.