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Finding the Fourth Proportional to 2,968.80, 4,453.20 and 2,421.60

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Solution

The fourth proportional to 2,968.80, 4,453.20 and 2,421.60 is: 3,632.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,968.80 : 4,453.20 = 2,421.60 : x
  2. Step 2: Convert to fraction form
    2,968.80/4,453.20 = 2,421.60/x
  3. Step 3: Cross multiply
    2,968.80x = 4,453.20 × 2,421.60
  4. Step 4: Simplify right side
    2,968.80x = 10,783,869.12
  5. Step 5: Solve for x
    x = 10,783,869.12/2,968.80
  6. Step 6: Final answer
    x = 3,632.40

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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.