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Finding the Fourth Proportional to 1,083.76, 1,625.92 and 353.40

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Solution

The fourth proportional to 1,083.76, 1,625.92 and 353.40 is: 530.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,083.76 : 1,625.92 = 353.40 : x
  2. Step 2: Convert to fraction form
    1,083.76/1,625.92 = 353.40/x
  3. Step 3: Cross multiply
    1,083.76x = 1,625.92 × 353.40
  4. Step 4: Simplify right side
    1,083.76x = 574,600.13
  5. Step 5: Solve for x
    x = 574,600.13/1,083.76
  6. Step 6: Final answer
    x = 530.19

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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.