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Finding the Fourth Proportional to 825.09, 1,237.65 and 548.00

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Solution

The fourth proportional to 825.09, 1,237.65 and 548.00 is: 822.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    825.09 : 1,237.65 = 548.00 : x
  2. Step 2: Convert to fraction form
    825.09/1,237.65 = 548.00/x
  3. Step 3: Cross multiply
    825.09x = 1,237.65 × 548.00
  4. Step 4: Simplify right side
    825.09x = 678,228.60
  5. Step 5: Solve for x
    x = 678,228.60/825.09
  6. Step 6: Final answer
    x = 822.01

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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.