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Finding the Fourth Proportional to 884.40, 1,222.20 and 726.78

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Solution

The fourth proportional to 884.40, 1,222.20 and 726.78 is: 1,004.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    884.40 : 1,222.20 = 726.78 : x
  2. Step 2: Convert to fraction form
    884.40/1,222.20 = 726.78/x
  3. Step 3: Cross multiply
    884.40x = 1,222.20 × 726.78
  4. Step 4: Simplify right side
    884.40x = 888,270.52
  5. Step 5: Solve for x
    x = 888,270.52/884.40
  6. Step 6: Final answer
    x = 1,004.38

Related Problems

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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.