Home / 2,420.13-3,630.24-688.80

Finding the Fourth Proportional to 2,420.13, 3,630.24 and 688.80

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Solution

The fourth proportional to 2,420.13, 3,630.24 and 688.80 is: 1,033.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,420.13 : 3,630.24 = 688.80 : x
  2. Step 2: Convert to fraction form
    2,420.13/3,630.24 = 688.80/x
  3. Step 3: Cross multiply
    2,420.13x = 3,630.24 × 688.80
  4. Step 4: Simplify right side
    2,420.13x = 2,500,509.31
  5. Step 5: Solve for x
    x = 2,500,509.31/2,420.13
  6. Step 6: Final answer
    x = 1,033.21

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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.