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Finding the Fourth Proportional to 889.83, 1,227.95 and 496.89

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Solution

The fourth proportional to 889.83, 1,227.95 and 496.89 is: 685.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.83 : 1,227.95 = 496.89 : x
  2. Step 2: Convert to fraction form
    889.83/1,227.95 = 496.89/x
  3. Step 3: Cross multiply
    889.83x = 1,227.95 × 496.89
  4. Step 4: Simplify right side
    889.83x = 610,153.59
  5. Step 5: Solve for x
    x = 610,153.59/889.83
  6. Step 6: Final answer
    x = 685.70

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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.