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Finding the Fourth Proportional to 829.15, 1,143.87 and 475

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Solution

The fourth proportional to 829.15, 1,143.87 and 475 is: 655.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.15 : 1,143.87 = 475 : x
  2. Step 2: Convert to fraction form
    829.15/1,143.87 = 475/x
  3. Step 3: Cross multiply
    829.15x = 1,143.87 × 475
  4. Step 4: Simplify right side
    829.15x = 543,338.25
  5. Step 5: Solve for x
    x = 543,338.25/829.15
  6. Step 6: Final answer
    x = 655.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.