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Finding the Fourth Proportional to 2,368.80, 3,268.80 and 1,320.84

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Solution

The fourth proportional to 2,368.80, 3,268.80 and 1,320.84 is: 1,822.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,368.80 : 3,268.80 = 1,320.84 : x
  2. Step 2: Convert to fraction form
    2,368.80/3,268.80 = 1,320.84/x
  3. Step 3: Cross multiply
    2,368.80x = 3,268.80 × 1,320.84
  4. Step 4: Simplify right side
    2,368.80x = 4,317,561.79
  5. Step 5: Solve for x
    x = 4,317,561.79/2,368.80
  6. Step 6: Final answer
    x = 1,822.68

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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.