Home / 1,412.30-2,118.20-475.14

Finding the Fourth Proportional to 1,412.30, 2,118.20 and 475.14

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Solution

The fourth proportional to 1,412.30, 2,118.20 and 475.14 is: 712.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.30 : 2,118.20 = 475.14 : x
  2. Step 2: Convert to fraction form
    1,412.30/2,118.20 = 475.14/x
  3. Step 3: Cross multiply
    1,412.30x = 2,118.20 × 475.14
  4. Step 4: Simplify right side
    1,412.30x = 1,006,441.55
  5. Step 5: Solve for x
    x = 1,006,441.55/1,412.30
  6. Step 6: Final answer
    x = 712.63

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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.