Home / 3,915.81-5,874.66-1,318.68

Finding the Fourth Proportional to 3,915.81, 5,874.66 and 1,318.68

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Solution

The fourth proportional to 3,915.81, 5,874.66 and 1,318.68 is: 1,978.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.81 : 5,874.66 = 1,318.68 : x
  2. Step 2: Convert to fraction form
    3,915.81/5,874.66 = 1,318.68/x
  3. Step 3: Cross multiply
    3,915.81x = 5,874.66 × 1,318.68
  4. Step 4: Simplify right side
    3,915.81x = 7,746,796.65
  5. Step 5: Solve for x
    x = 7,746,796.65/3,915.81
  6. Step 6: Final answer
    x = 1,978.34

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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.