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Finding the Fourth Proportional to 825.16, 1,135.68 and 591.88

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Solution

The fourth proportional to 825.16, 1,135.68 and 591.88 is: 814.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    825.16 : 1,135.68 = 591.88 : x
  2. Step 2: Convert to fraction form
    825.16/1,135.68 = 591.88/x
  3. Step 3: Cross multiply
    825.16x = 1,135.68 × 591.88
  4. Step 4: Simplify right side
    825.16x = 672,186.28
  5. Step 5: Solve for x
    x = 672,186.28/825.16
  6. Step 6: Final answer
    x = 814.61

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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.