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Finding the Fourth Proportional to 1,083.89, 1,626.21 and 353.46

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Solution

The fourth proportional to 1,083.89, 1,626.21 and 353.46 is: 530.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,083.89 : 1,626.21 = 353.46 : x
  2. Step 2: Convert to fraction form
    1,083.89/1,626.21 = 353.46/x
  3. Step 3: Cross multiply
    1,083.89x = 1,626.21 × 353.46
  4. Step 4: Simplify right side
    1,083.89x = 574,800.19
  5. Step 5: Solve for x
    x = 574,800.19/1,083.89
  6. Step 6: Final answer
    x = 530.31

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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.