Home / 3,980.36-5,970.50-2,420.80

Finding the Fourth Proportional to 3,980.36, 5,970.50 and 2,420.80

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Solution

The fourth proportional to 3,980.36, 5,970.50 and 2,420.80 is: 3,631.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.36 : 5,970.50 = 2,420.80 : x
  2. Step 2: Convert to fraction form
    3,980.36/5,970.50 = 2,420.80/x
  3. Step 3: Cross multiply
    3,980.36x = 5,970.50 × 2,420.80
  4. Step 4: Simplify right side
    3,980.36x = 14,453,368.45
  5. Step 5: Solve for x
    x = 14,453,368.45/3,980.36
  6. Step 6: Final answer
    x = 3,631.17

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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.