Home / 3,980.42-5,970.58-2,420.85

Finding the Fourth Proportional to 3,980.42, 5,970.58 and 2,420.85

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Solution

The fourth proportional to 3,980.42, 5,970.58 and 2,420.85 is: 3,631.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.42 : 5,970.58 = 2,420.85 : x
  2. Step 2: Convert to fraction form
    3,980.42/5,970.58 = 2,420.85/x
  3. Step 3: Cross multiply
    3,980.42x = 5,970.58 × 2,420.85
  4. Step 4: Simplify right side
    3,980.42x = 14,453,904.01
  5. Step 5: Solve for x
    x = 14,453,904.01/3,980.42
  6. Step 6: Final answer
    x = 3,631.25

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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.