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Finding the Fourth Proportional to 825.06, 1,237.77 and 386.58

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Solution

The fourth proportional to 825.06, 1,237.77 and 386.58 is: 579.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    825.06 : 1,237.77 = 386.58 : x
  2. Step 2: Convert to fraction form
    825.06/1,237.77 = 386.58/x
  3. Step 3: Cross multiply
    825.06x = 1,237.77 × 386.58
  4. Step 4: Simplify right side
    825.06x = 478,497.13
  5. Step 5: Solve for x
    x = 478,497.13/825.06
  6. Step 6: Final answer
    x = 579.95

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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.