Home / 1,412.28-2,118.21-372.30

Finding the Fourth Proportional to 1,412.28, 2,118.21 and 372.30

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Solution

The fourth proportional to 1,412.28, 2,118.21 and 372.30 is: 558.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.28 : 2,118.21 = 372.30 : x
  2. Step 2: Convert to fraction form
    1,412.28/2,118.21 = 372.30/x
  3. Step 3: Cross multiply
    1,412.28x = 2,118.21 × 372.30
  4. Step 4: Simplify right side
    1,412.28x = 788,609.58
  5. Step 5: Solve for x
    x = 788,609.58/1,412.28
  6. Step 6: Final answer
    x = 558.39

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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.