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Finding the Fourth Proportional to 355.28, 530.16 and 327.86

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Solution

The fourth proportional to 355.28, 530.16 and 327.86 is: 489.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.28 : 530.16 = 327.86 : x
  2. Step 2: Convert to fraction form
    355.28/530.16 = 327.86/x
  3. Step 3: Cross multiply
    355.28x = 530.16 × 327.86
  4. Step 4: Simplify right side
    355.28x = 173,818.26
  5. Step 5: Solve for x
    x = 173,818.26/355.28
  6. Step 6: Final answer
    x = 489.24

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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.