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Finding the Fourth Proportional to 2,321.81, 3,482.70 and 678.48

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Solution

The fourth proportional to 2,321.81, 3,482.70 and 678.48 is: 1,017.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,321.81 : 3,482.70 = 678.48 : x
  2. Step 2: Convert to fraction form
    2,321.81/3,482.70 = 678.48/x
  3. Step 3: Cross multiply
    2,321.81x = 3,482.70 × 678.48
  4. Step 4: Simplify right side
    2,321.81x = 2,362,926.69
  5. Step 5: Solve for x
    x = 2,362,926.69/2,321.81
  6. Step 6: Final answer
    x = 1,017.71

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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.