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Finding the Fourth Proportional to 884.25, 1,220.13 and 511.11

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Solution

The fourth proportional to 884.25, 1,220.13 and 511.11 is: 705.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    884.25 : 1,220.13 = 511.11 : x
  2. Step 2: Convert to fraction form
    884.25/1,220.13 = 511.11/x
  3. Step 3: Cross multiply
    884.25x = 1,220.13 × 511.11
  4. Step 4: Simplify right side
    884.25x = 623,620.64
  5. Step 5: Solve for x
    x = 623,620.64/884.25
  6. Step 6: Final answer
    x = 705.25

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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.