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Finding the Fourth Proportional to 605.12, 907.36 and 330.56

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Solution

The fourth proportional to 605.12, 907.36 and 330.56 is: 495.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.12 : 907.36 = 330.56 : x
  2. Step 2: Convert to fraction form
    605.12/907.36 = 330.56/x
  3. Step 3: Cross multiply
    605.12x = 907.36 × 330.56
  4. Step 4: Simplify right side
    605.12x = 299,936.92
  5. Step 5: Solve for x
    x = 299,936.92/605.12
  6. Step 6: Final answer
    x = 495.67

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.