Home / 1,412.58-2,118.06-438.42

Finding the Fourth Proportional to 1,412.58, 2,118.06 and 438.42

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Solution

The fourth proportional to 1,412.58, 2,118.06 and 438.42 is: 657.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.58 : 2,118.06 = 438.42 : x
  2. Step 2: Convert to fraction form
    1,412.58/2,118.06 = 438.42/x
  3. Step 3: Cross multiply
    1,412.58x = 2,118.06 × 438.42
  4. Step 4: Simplify right side
    1,412.58x = 928,599.87
  5. Step 5: Solve for x
    x = 928,599.87/1,412.58
  6. Step 6: Final answer
    x = 657.38

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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.