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Finding the Fourth Proportional to 617.36, 852 and 355.40

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Solution

The fourth proportional to 617.36, 852 and 355.40 is: 490.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.36 : 852 = 355.40 : x
  2. Step 2: Convert to fraction form
    617.36/852 = 355.40/x
  3. Step 3: Cross multiply
    617.36x = 852 × 355.40
  4. Step 4: Simplify right side
    617.36x = 302,800.80
  5. Step 5: Solve for x
    x = 302,800.80/617.36
  6. Step 6: Final answer
    x = 490.48

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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.