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Finding the Fourth Proportional to 354.32, 531.16 and 245.76

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Solution

The fourth proportional to 354.32, 531.16 and 245.76 is: 368.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.32 : 531.16 = 245.76 : x
  2. Step 2: Convert to fraction form
    354.32/531.16 = 245.76/x
  3. Step 3: Cross multiply
    354.32x = 531.16 × 245.76
  4. Step 4: Simplify right side
    354.32x = 130,537.88
  5. Step 5: Solve for x
    x = 130,537.88/354.32
  6. Step 6: Final answer
    x = 368.42

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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.