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Finding the Fourth Proportional to 2,815.58, 4,218.74 and 965.68

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Solution

The fourth proportional to 2,815.58, 4,218.74 and 965.68 is: 1,446.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.58 : 4,218.74 = 965.68 : x
  2. Step 2: Convert to fraction form
    2,815.58/4,218.74 = 965.68/x
  3. Step 3: Cross multiply
    2,815.58x = 4,218.74 × 965.68
  4. Step 4: Simplify right side
    2,815.58x = 4,073,952.84
  5. Step 5: Solve for x
    x = 4,073,952.84/2,815.58
  6. Step 6: Final answer
    x = 1,446.93

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1.5x scale

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.