Home / 1,628.19-2,246.80-998.72

Finding the Fourth Proportional to 1,628.19, 2,246.80 and 998.72

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Solution

The fourth proportional to 1,628.19, 2,246.80 and 998.72 is: 1,378.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,628.19 : 2,246.80 = 998.72 : x
  2. Step 2: Convert to fraction form
    1,628.19/2,246.80 = 998.72/x
  3. Step 3: Cross multiply
    1,628.19x = 2,246.80 × 998.72
  4. Step 4: Simplify right side
    1,628.19x = 2,243,924.10
  5. Step 5: Solve for x
    x = 2,243,924.10/1,628.19
  6. Step 6: Final answer
    x = 1,378.17

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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.