Home / 2,620.10-3,928.80-975.80

Finding the Fourth Proportional to 2,620.10, 3,928.80 and 975.80

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Solution

The fourth proportional to 2,620.10, 3,928.80 and 975.80 is: 1,463.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,620.10 : 3,928.80 = 975.80 : x
  2. Step 2: Convert to fraction form
    2,620.10/3,928.80 = 975.80/x
  3. Step 3: Cross multiply
    2,620.10x = 3,928.80 × 975.80
  4. Step 4: Simplify right side
    2,620.10x = 3,833,723.04
  5. Step 5: Solve for x
    x = 3,833,723.04/2,620.10
  6. Step 6: Final answer
    x = 1,463.20

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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.