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Finding the Fourth Proportional to 605.40, 835.64 and 481.28

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Solution

The fourth proportional to 605.40, 835.64 and 481.28 is: 664.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.40 : 835.64 = 481.28 : x
  2. Step 2: Convert to fraction form
    605.40/835.64 = 481.28/x
  3. Step 3: Cross multiply
    605.40x = 835.64 × 481.28
  4. Step 4: Simplify right side
    605.40x = 402,176.82
  5. Step 5: Solve for x
    x = 402,176.82/605.40
  6. Step 6: Final answer
    x = 664.32

Related Problems

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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.