Home / 2,179.35-3,005.40-1,681.20

Finding the Fourth Proportional to 2,179.35, 3,005.40 and 1,681.20

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Solution

The fourth proportional to 2,179.35, 3,005.40 and 1,681.20 is: 2,318.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,179.35 : 3,005.40 = 1,681.20 : x
  2. Step 2: Convert to fraction form
    2,179.35/3,005.40 = 1,681.20/x
  3. Step 3: Cross multiply
    2,179.35x = 3,005.40 × 1,681.20
  4. Step 4: Simplify right side
    2,179.35x = 5,052,678.48
  5. Step 5: Solve for x
    x = 5,052,678.48/2,179.35
  6. Step 6: Final answer
    x = 2,318.43

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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.