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Finding the Fourth Proportional to 1,084.08, 1,625.65 and 343.51

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Solution

The fourth proportional to 1,084.08, 1,625.65 and 343.51 is: 515.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,084.08 : 1,625.65 = 343.51 : x
  2. Step 2: Convert to fraction form
    1,084.08/1,625.65 = 343.51/x
  3. Step 3: Cross multiply
    1,084.08x = 1,625.65 × 343.51
  4. Step 4: Simplify right side
    1,084.08x = 558,427.03
  5. Step 5: Solve for x
    x = 558,427.03/1,084.08
  6. Step 6: Final answer
    x = 515.12

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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.