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Finding the Fourth Proportional to 355.92, 530.85 and 306.60

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Solution

The fourth proportional to 355.92, 530.85 and 306.60 is: 457.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.92 : 530.85 = 306.60 : x
  2. Step 2: Convert to fraction form
    355.92/530.85 = 306.60/x
  3. Step 3: Cross multiply
    355.92x = 530.85 × 306.60
  4. Step 4: Simplify right side
    355.92x = 162,758.61
  5. Step 5: Solve for x
    x = 162,758.61/355.92
  6. Step 6: Final answer
    x = 457.29

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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.