Home / 3,990.52-5,506.26-2,312.20

Finding the Fourth Proportional to 3,990.52, 5,506.26 and 2,312.20

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Solution

The fourth proportional to 3,990.52, 5,506.26 and 2,312.20 is: 3,190.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.52 : 5,506.26 = 2,312.20 : x
  2. Step 2: Convert to fraction form
    3,990.52/5,506.26 = 2,312.20/x
  3. Step 3: Cross multiply
    3,990.52x = 5,506.26 × 2,312.20
  4. Step 4: Simplify right side
    3,990.52x = 12,731,574.37
  5. Step 5: Solve for x
    x = 12,731,574.37/3,990.52
  6. Step 6: Final answer
    x = 3,190.45

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1.5x scale

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.