Home / 2,848.12-3,928.86-1,728.40

Finding the Fourth Proportional to 2,848.12, 3,928.86 and 1,728.40

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Solution

The fourth proportional to 2,848.12, 3,928.86 and 1,728.40 is: 2,384.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,848.12 : 3,928.86 = 1,728.40 : x
  2. Step 2: Convert to fraction form
    2,848.12/3,928.86 = 1,728.40/x
  3. Step 3: Cross multiply
    2,848.12x = 3,928.86 × 1,728.40
  4. Step 4: Simplify right side
    2,848.12x = 6,790,641.62
  5. Step 5: Solve for x
    x = 6,790,641.62/2,848.12
  6. Step 6: Final answer
    x = 2,384.25

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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.