Home / 3,030.80-4,546.20-1,390.55

Finding the Fourth Proportional to 3,030.80, 4,546.20 and 1,390.55

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Solution

The fourth proportional to 3,030.80, 4,546.20 and 1,390.55 is: 2,085.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,030.80 : 4,546.20 = 1,390.55 : x
  2. Step 2: Convert to fraction form
    3,030.80/4,546.20 = 1,390.55/x
  3. Step 3: Cross multiply
    3,030.80x = 4,546.20 × 1,390.55
  4. Step 4: Simplify right side
    3,030.80x = 6,321,718.41
  5. Step 5: Solve for x
    x = 6,321,718.41/3,030.80
  6. Step 6: Final answer
    x = 2,085.83

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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.