Home / 3,990.34-5,985.63-1,680.22

Finding the Fourth Proportional to 3,990.34, 5,985.63 and 1,680.22

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Solution

The fourth proportional to 3,990.34, 5,985.63 and 1,680.22 is: 2,520.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.34 : 5,985.63 = 1,680.22 : x
  2. Step 2: Convert to fraction form
    3,990.34/5,985.63 = 1,680.22/x
  3. Step 3: Cross multiply
    3,990.34x = 5,985.63 × 1,680.22
  4. Step 4: Simplify right side
    3,990.34x = 10,057,175.24
  5. Step 5: Solve for x
    x = 10,057,175.24/3,990.34
  6. Step 6: Final answer
    x = 2,520.38

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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.