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Finding the Fourth Proportional to 685.26, 944.46 and 554.58

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Solution

The fourth proportional to 685.26, 944.46 and 554.58 is: 764.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    685.26 : 944.46 = 554.58 : x
  2. Step 2: Convert to fraction form
    685.26/944.46 = 554.58/x
  3. Step 3: Cross multiply
    685.26x = 944.46 × 554.58
  4. Step 4: Simplify right side
    685.26x = 523,778.63
  5. Step 5: Solve for x
    x = 523,778.63/685.26
  6. Step 6: Final answer
    x = 764.35

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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.