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Finding the Fourth Proportional to 685.34, 945.60 and 436.56

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Solution

The fourth proportional to 685.34, 945.60 and 436.56 is: 602.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    685.34 : 945.60 = 436.56 : x
  2. Step 2: Convert to fraction form
    685.34/945.60 = 436.56/x
  3. Step 3: Cross multiply
    685.34x = 945.60 × 436.56
  4. Step 4: Simplify right side
    685.34x = 412,811.14
  5. Step 5: Solve for x
    x = 412,811.14/685.34
  6. Step 6: Final answer
    x = 602.35

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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.