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Finding the Fourth Proportional to 887.58, 1,224.87 and 494.61

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Solution

The fourth proportional to 887.58, 1,224.87 and 494.61 is: 682.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.58 : 1,224.87 = 494.61 : x
  2. Step 2: Convert to fraction form
    887.58/1,224.87 = 494.61/x
  3. Step 3: Cross multiply
    887.58x = 1,224.87 × 494.61
  4. Step 4: Simplify right side
    887.58x = 605,832.95
  5. Step 5: Solve for x
    x = 605,832.95/887.58
  6. Step 6: Final answer
    x = 682.57

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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.