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Finding the Fourth Proportional to 1,352.34, 2,028.40 and 427.93

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Solution

The fourth proportional to 1,352.34, 2,028.40 and 427.93 is: 641.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,352.34 : 2,028.40 = 427.93 : x
  2. Step 2: Convert to fraction form
    1,352.34/2,028.40 = 427.93/x
  3. Step 3: Cross multiply
    1,352.34x = 2,028.40 × 427.93
  4. Step 4: Simplify right side
    1,352.34x = 868,013.21
  5. Step 5: Solve for x
    x = 868,013.21/1,352.34
  6. Step 6: Final answer
    x = 641.86

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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.