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Finding the Fourth Proportional to 2,410.20, 3,615.30 and 655.20

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Solution

The fourth proportional to 2,410.20, 3,615.30 and 655.20 is: 982.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,410.20 : 3,615.30 = 655.20 : x
  2. Step 2: Convert to fraction form
    2,410.20/3,615.30 = 655.20/x
  3. Step 3: Cross multiply
    2,410.20x = 3,615.30 × 655.20
  4. Step 4: Simplify right side
    2,410.20x = 2,368,744.56
  5. Step 5: Solve for x
    x = 2,368,744.56/2,410.20
  6. Step 6: Final answer
    x = 982.80

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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.