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Finding the Fourth Proportional to 884.32, 1,220.54 and 636.46

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Solution

The fourth proportional to 884.32, 1,220.54 and 636.46 is: 878.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    884.32 : 1,220.54 = 636.46 : x
  2. Step 2: Convert to fraction form
    884.32/1,220.54 = 636.46/x
  3. Step 3: Cross multiply
    884.32x = 1,220.54 × 636.46
  4. Step 4: Simplify right side
    884.32x = 776,818.65
  5. Step 5: Solve for x
    x = 776,818.65/884.32
  6. Step 6: Final answer
    x = 878.44

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Double scale
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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.