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Finding the Fourth Proportional to 830.88, 1,134.99 and 825.48

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Solution

The fourth proportional to 830.88, 1,134.99 and 825.48 is: 1,127.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.88 : 1,134.99 = 825.48 : x
  2. Step 2: Convert to fraction form
    830.88/1,134.99 = 825.48/x
  3. Step 3: Cross multiply
    830.88x = 1,134.99 × 825.48
  4. Step 4: Simplify right side
    830.88x = 936,911.55
  5. Step 5: Solve for x
    x = 936,911.55/830.88
  6. Step 6: Final answer
    x = 1,127.61

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.