Home / 3,985.80-5,973.30-2,320.80

Finding the Fourth Proportional to 3,985.80, 5,973.30 and 2,320.80

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Solution

The fourth proportional to 3,985.80, 5,973.30 and 2,320.80 is: 3,478.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985.80 : 5,973.30 = 2,320.80 : x
  2. Step 2: Convert to fraction form
    3,985.80/5,973.30 = 2,320.80/x
  3. Step 3: Cross multiply
    3,985.80x = 5,973.30 × 2,320.80
  4. Step 4: Simplify right side
    3,985.80x = 13,862,834.64
  5. Step 5: Solve for x
    x = 13,862,834.64/3,985.80
  6. Step 6: Final answer
    x = 3,478.06

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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.