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Finding the Fourth Proportional to 685.53, 945.54 and 436.59

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Solution

The fourth proportional to 685.53, 945.54 and 436.59 is: 602.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    685.53 : 945.54 = 436.59 : x
  2. Step 2: Convert to fraction form
    685.53/945.54 = 436.59/x
  3. Step 3: Cross multiply
    685.53x = 945.54 × 436.59
  4. Step 4: Simplify right side
    685.53x = 412,813.31
  5. Step 5: Solve for x
    x = 412,813.31/685.53
  6. Step 6: Final answer
    x = 602.18

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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.