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Finding the Fourth Proportional to 349.58, 521.86 and 325.28

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Solution

The fourth proportional to 349.58, 521.86 and 325.28 is: 485.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.58 : 521.86 = 325.28 : x
  2. Step 2: Convert to fraction form
    349.58/521.86 = 325.28/x
  3. Step 3: Cross multiply
    349.58x = 521.86 × 325.28
  4. Step 4: Simplify right side
    349.58x = 169,750.62
  5. Step 5: Solve for x
    x = 169,750.62/349.58
  6. Step 6: Final answer
    x = 485.58

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.