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Finding the Fourth Proportional to 883.97, 1,220.00 and 636.11

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Solution

The fourth proportional to 883.97, 1,220.00 and 636.11 is: 877.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.97 : 1,220.00 = 636.11 : x
  2. Step 2: Convert to fraction form
    883.97/1,220.00 = 636.11/x
  3. Step 3: Cross multiply
    883.97x = 1,220.00 × 636.11
  4. Step 4: Simplify right side
    883.97x = 776,044.92
  5. Step 5: Solve for x
    x = 776,044.92/883.97
  6. Step 6: Final answer
    x = 877.91

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1.5x scale

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.