Home / 2,485.61-3,428.13-2,186.20

Finding the Fourth Proportional to 2,485.61, 3,428.13 and 2,186.20

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Solution

The fourth proportional to 2,485.61, 3,428.13 and 2,186.20 is: 3,015.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,485.61 : 3,428.13 = 2,186.20 : x
  2. Step 2: Convert to fraction form
    2,485.61/3,428.13 = 2,186.20/x
  3. Step 3: Cross multiply
    2,485.61x = 3,428.13 × 2,186.20
  4. Step 4: Simplify right side
    2,485.61x = 7,494,577.81
  5. Step 5: Solve for x
    x = 7,494,577.81/2,485.61
  6. Step 6: Final answer
    x = 3,015.19

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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.