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Finding the Fourth Proportional to 355.53, 530.16 and 330.87

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Solution

The fourth proportional to 355.53, 530.16 and 330.87 is: 493.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.53 : 530.16 = 330.87 : x
  2. Step 2: Convert to fraction form
    355.53/530.16 = 330.87/x
  3. Step 3: Cross multiply
    355.53x = 530.16 × 330.87
  4. Step 4: Simplify right side
    355.53x = 175,414.04
  5. Step 5: Solve for x
    x = 175,414.04/355.53
  6. Step 6: Final answer
    x = 493.39

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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.