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Finding the Fourth Proportional to 825.34, 1,236.38 and 547.51

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Solution

The fourth proportional to 825.34, 1,236.38 and 547.51 is: 820.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    825.34 : 1,236.38 = 547.51 : x
  2. Step 2: Convert to fraction form
    825.34/1,236.38 = 547.51/x
  3. Step 3: Cross multiply
    825.34x = 1,236.38 × 547.51
  4. Step 4: Simplify right side
    825.34x = 676,924.23
  5. Step 5: Solve for x
    x = 676,924.23/825.34
  6. Step 6: Final answer
    x = 820.18

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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.