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Finding the Fourth Proportional to 496.69, 685.40 and 275.63

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Solution

The fourth proportional to 496.69, 685.40 and 275.63 is: 380.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.69 : 685.40 = 275.63 : x
  2. Step 2: Convert to fraction form
    496.69/685.40 = 275.63/x
  3. Step 3: Cross multiply
    496.69x = 685.40 × 275.63
  4. Step 4: Simplify right side
    496.69x = 188,912.00
  5. Step 5: Solve for x
    x = 188,912.00/496.69
  6. Step 6: Final answer
    x = 380.34

Related Problems

Find fourth proportional to 248.34, 342.70 and 137.81
Half scale
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Double scale
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Similar ratio
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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.