Home / 2,870.81-3,961.79-1,628.81

Finding the Fourth Proportional to 2,870.81, 3,961.79 and 1,628.81

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Solution

The fourth proportional to 2,870.81, 3,961.79 and 1,628.81 is: 2,247.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,870.81 : 3,961.79 = 1,628.81 : x
  2. Step 2: Convert to fraction form
    2,870.81/3,961.79 = 1,628.81/x
  3. Step 3: Cross multiply
    2,870.81x = 3,961.79 × 1,628.81
  4. Step 4: Simplify right side
    2,870.81x = 6,452,995.03
  5. Step 5: Solve for x
    x = 6,452,995.03/2,870.81
  6. Step 6: Final answer
    x = 2,247.80

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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.