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Finding the Fourth Proportional to 855.49, 1,283.26 and 335.47

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Solution

The fourth proportional to 855.49, 1,283.26 and 335.47 is: 503.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.49 : 1,283.26 = 335.47 : x
  2. Step 2: Convert to fraction form
    855.49/1,283.26 = 335.47/x
  3. Step 3: Cross multiply
    855.49x = 1,283.26 × 335.47
  4. Step 4: Simplify right side
    855.49x = 430,495.23
  5. Step 5: Solve for x
    x = 430,495.23/855.49
  6. Step 6: Final answer
    x = 503.21

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.