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Finding the Fourth Proportional to 1,351.96, 2,027.64 and 427.40

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Solution

The fourth proportional to 1,351.96, 2,027.64 and 427.40 is: 641.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351.96 : 2,027.64 = 427.40 : x
  2. Step 2: Convert to fraction form
    1,351.96/2,027.64 = 427.40/x
  3. Step 3: Cross multiply
    1,351.96x = 2,027.64 × 427.40
  4. Step 4: Simplify right side
    1,351.96x = 866,613.34
  5. Step 5: Solve for x
    x = 866,613.34/1,351.96
  6. Step 6: Final answer
    x = 641.01

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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.