Home / 1,401.72-2,101.96-427.56

Finding the Fourth Proportional to 1,401.72, 2,101.96 and 427.56

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Solution

The fourth proportional to 1,401.72, 2,101.96 and 427.56 is: 641.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,401.72 : 2,101.96 = 427.56 : x
  2. Step 2: Convert to fraction form
    1,401.72/2,101.96 = 427.56/x
  3. Step 3: Cross multiply
    1,401.72x = 2,101.96 × 427.56
  4. Step 4: Simplify right side
    1,401.72x = 898,714.02
  5. Step 5: Solve for x
    x = 898,714.02/1,401.72
  6. Step 6: Final answer
    x = 641.15

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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.