Home / 2,420.32-3,630.46-688.95

Finding the Fourth Proportional to 2,420.32, 3,630.46 and 688.95

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Solution

The fourth proportional to 2,420.32, 3,630.46 and 688.95 is: 1,033.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,420.32 : 3,630.46 = 688.95 : x
  2. Step 2: Convert to fraction form
    2,420.32/3,630.46 = 688.95/x
  3. Step 3: Cross multiply
    2,420.32x = 3,630.46 × 688.95
  4. Step 4: Simplify right side
    2,420.32x = 2,501,205.42
  5. Step 5: Solve for x
    x = 2,501,205.42/2,420.32
  6. Step 6: Final answer
    x = 1,033.42

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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.