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Finding the Fourth Proportional to 685.29, 945.78 and 436.62

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Solution

The fourth proportional to 685.29, 945.78 and 436.62 is: 602.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    685.29 : 945.78 = 436.62 : x
  2. Step 2: Convert to fraction form
    685.29/945.78 = 436.62/x
  3. Step 3: Cross multiply
    685.29x = 945.78 × 436.62
  4. Step 4: Simplify right side
    685.29x = 412,946.46
  5. Step 5: Solve for x
    x = 412,946.46/685.29
  6. Step 6: Final answer
    x = 602.59

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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.