Home / 1,412.24-2,118.62-438.11

Finding the Fourth Proportional to 1,412.24, 2,118.62 and 438.11

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Solution

The fourth proportional to 1,412.24, 2,118.62 and 438.11 is: 657.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.24 : 2,118.62 = 438.11 : x
  2. Step 2: Convert to fraction form
    1,412.24/2,118.62 = 438.11/x
  3. Step 3: Cross multiply
    1,412.24x = 2,118.62 × 438.11
  4. Step 4: Simplify right side
    1,412.24x = 928,187.06
  5. Step 5: Solve for x
    x = 928,187.06/1,412.24
  6. Step 6: Final answer
    x = 657.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.