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Finding the Fourth Proportional to 355.50, 530.57 and 326.10

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Solution

The fourth proportional to 355.50, 530.57 and 326.10 is: 486.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.50 : 530.57 = 326.10 : x
  2. Step 2: Convert to fraction form
    355.50/530.57 = 326.10/x
  3. Step 3: Cross multiply
    355.50x = 530.57 × 326.10
  4. Step 4: Simplify right side
    355.50x = 173,018.88
  5. Step 5: Solve for x
    x = 173,018.88/355.50
  6. Step 6: Final answer
    x = 486.69

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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.