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Finding the Fourth Proportional to 884.69, 1,220.55 and 552.99

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Solution

The fourth proportional to 884.69, 1,220.55 and 552.99 is: 762.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    884.69 : 1,220.55 = 552.99 : x
  2. Step 2: Convert to fraction form
    884.69/1,220.55 = 552.99/x
  3. Step 3: Cross multiply
    884.69x = 1,220.55 × 552.99
  4. Step 4: Simplify right side
    884.69x = 674,951.94
  5. Step 5: Solve for x
    x = 674,951.94/884.69
  6. Step 6: Final answer
    x = 762.92

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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.