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Finding the Fourth Proportional to 884.52, 1,220.67 and 687.69

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Solution

The fourth proportional to 884.52, 1,220.67 and 687.69 is: 949.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    884.52 : 1,220.67 = 687.69 : x
  2. Step 2: Convert to fraction form
    884.52/1,220.67 = 687.69/x
  3. Step 3: Cross multiply
    884.52x = 1,220.67 × 687.69
  4. Step 4: Simplify right side
    884.52x = 839,442.55
  5. Step 5: Solve for x
    x = 839,442.55/884.52
  6. Step 6: Final answer
    x = 949.04

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Half scale
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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.