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Finding the Fourth Proportional to 355.70, 530.72 and 353.66

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Solution

The fourth proportional to 355.70, 530.72 and 353.66 is: 527.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.70 : 530.72 = 353.66 : x
  2. Step 2: Convert to fraction form
    355.70/530.72 = 353.66/x
  3. Step 3: Cross multiply
    355.70x = 530.72 × 353.66
  4. Step 4: Simplify right side
    355.70x = 187,694.44
  5. Step 5: Solve for x
    x = 187,694.44/355.70
  6. Step 6: Final answer
    x = 527.68

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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.