Home / 2,847.21-3,929.54-1,668.75

Finding the Fourth Proportional to 2,847.21, 3,929.54 and 1,668.75

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Solution

The fourth proportional to 2,847.21, 3,929.54 and 1,668.75 is: 2,303.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,847.21 : 3,929.54 = 1,668.75 : x
  2. Step 2: Convert to fraction form
    2,847.21/3,929.54 = 1,668.75/x
  3. Step 3: Cross multiply
    2,847.21x = 3,929.54 × 1,668.75
  4. Step 4: Simplify right side
    2,847.21x = 6,557,411.53
  5. Step 5: Solve for x
    x = 6,557,411.53/2,847.21
  6. Step 6: Final answer
    x = 2,303.10

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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.