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Finding the Fourth Proportional to 884.45, 1,220.96 and 553.37

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Solution

The fourth proportional to 884.45, 1,220.96 and 553.37 is: 763.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    884.45 : 1,220.96 = 553.37 : x
  2. Step 2: Convert to fraction form
    884.45/1,220.96 = 553.37/x
  3. Step 3: Cross multiply
    884.45x = 1,220.96 × 553.37
  4. Step 4: Simplify right side
    884.45x = 675,633.76
  5. Step 5: Solve for x
    x = 675,633.76/884.45
  6. Step 6: Final answer
    x = 763.90

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.