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Finding the Fourth Proportional to 355.30, 530.41 and 300.61

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Solution

The fourth proportional to 355.30, 530.41 and 300.61 is: 448.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.30 : 530.41 = 300.61 : x
  2. Step 2: Convert to fraction form
    355.30/530.41 = 300.61/x
  3. Step 3: Cross multiply
    355.30x = 530.41 × 300.61
  4. Step 4: Simplify right side
    355.30x = 159,447.30
  5. Step 5: Solve for x
    x = 159,447.30/355.30
  6. Step 6: Final answer
    x = 448.77

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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.