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Finding the Fourth Proportional to 617.45, 852.06 and 355.47

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Solution

The fourth proportional to 617.45, 852.06 and 355.47 is: 490.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.45 : 852.06 = 355.47 : x
  2. Step 2: Convert to fraction form
    617.45/852.06 = 355.47/x
  3. Step 3: Cross multiply
    617.45x = 852.06 × 355.47
  4. Step 4: Simplify right side
    617.45x = 302,881.77
  5. Step 5: Solve for x
    x = 302,881.77/617.45
  6. Step 6: Final answer
    x = 490.54

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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.