Home / 3,120.40-4,660.35-2,827.32

Finding the Fourth Proportional to 3,120.40, 4,660.35 and 2,827.32

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Solution

The fourth proportional to 3,120.40, 4,660.35 and 2,827.32 is: 4,222.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.40 : 4,660.35 = 2,827.32 : x
  2. Step 2: Convert to fraction form
    3,120.40/4,660.35 = 2,827.32/x
  3. Step 3: Cross multiply
    3,120.40x = 4,660.35 × 2,827.32
  4. Step 4: Simplify right side
    3,120.40x = 13,176,300.76
  5. Step 5: Solve for x
    x = 13,176,300.76/3,120.40
  6. Step 6: Final answer
    x = 4,222.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.