Home / 3,990.69-5,506.43-2,312.01

Finding the Fourth Proportional to 3,990.69, 5,506.43 and 2,312.01

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Solution

The fourth proportional to 3,990.69, 5,506.43 and 2,312.01 is: 3,190.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.69 : 5,506.43 = 2,312.01 : x
  2. Step 2: Convert to fraction form
    3,990.69/5,506.43 = 2,312.01/x
  3. Step 3: Cross multiply
    3,990.69x = 5,506.43 × 2,312.01
  4. Step 4: Simplify right side
    3,990.69x = 12,730,909.66
  5. Step 5: Solve for x
    x = 12,730,909.66/3,990.69
  6. Step 6: Final answer
    x = 3,190.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.