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Finding the Fourth Proportional to 1,084.31, 1,625.89 and 353.80

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Solution

The fourth proportional to 1,084.31, 1,625.89 and 353.80 is: 530.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,084.31 : 1,625.89 = 353.80 : x
  2. Step 2: Convert to fraction form
    1,084.31/1,625.89 = 353.80/x
  3. Step 3: Cross multiply
    1,084.31x = 1,625.89 × 353.80
  4. Step 4: Simplify right side
    1,084.31x = 575,239.88
  5. Step 5: Solve for x
    x = 575,239.88/1,084.31
  6. Step 6: Final answer
    x = 530.51

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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.