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Finding the Fourth Proportional to 440.76, 608.17 and 254.21

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Solution

The fourth proportional to 440.76, 608.17 and 254.21 is: 350.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.76 : 608.17 = 254.21 : x
  2. Step 2: Convert to fraction form
    440.76/608.17 = 254.21/x
  3. Step 3: Cross multiply
    440.76x = 608.17 × 254.21
  4. Step 4: Simplify right side
    440.76x = 154,602.90
  5. Step 5: Solve for x
    x = 154,602.90/440.76
  6. Step 6: Final answer
    x = 350.76

Related Problems

Find fourth proportional to 220.38, 304.09 and 127.11
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.