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Finding the Fourth Proportional to 1,684.56, 2,326.68 and 1,188.48

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Solution

The fourth proportional to 1,684.56, 2,326.68 and 1,188.48 is: 1,641.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,684.56 : 2,326.68 = 1,188.48 : x
  2. Step 2: Convert to fraction form
    1,684.56/2,326.68 = 1,188.48/x
  3. Step 3: Cross multiply
    1,684.56x = 2,326.68 × 1,188.48
  4. Step 4: Simplify right side
    1,684.56x = 2,765,212.65
  5. Step 5: Solve for x
    x = 2,765,212.65/1,684.56
  6. Step 6: Final answer
    x = 1,641.50

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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.