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Finding the Fourth Proportional to 685.88, 945.76 and 436.92

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Solution

The fourth proportional to 685.88, 945.76 and 436.92 is: 602.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    685.88 : 945.76 = 436.92 : x
  2. Step 2: Convert to fraction form
    685.88/945.76 = 436.92/x
  3. Step 3: Cross multiply
    685.88x = 945.76 × 436.92
  4. Step 4: Simplify right side
    685.88x = 413,221.46
  5. Step 5: Solve for x
    x = 413,221.46/685.88
  6. Step 6: Final answer
    x = 602.47

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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.