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Finding the Fourth Proportional to 1,141.98, 1,712.97 and 320.25

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Solution

The fourth proportional to 1,141.98, 1,712.97 and 320.25 is: 480.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,141.98 : 1,712.97 = 320.25 : x
  2. Step 2: Convert to fraction form
    1,141.98/1,712.97 = 320.25/x
  3. Step 3: Cross multiply
    1,141.98x = 1,712.97 × 320.25
  4. Step 4: Simplify right side
    1,141.98x = 548,578.64
  5. Step 5: Solve for x
    x = 548,578.64/1,141.98
  6. Step 6: Final answer
    x = 480.38

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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.