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Finding the Fourth Proportional to 354.36, 530.82 and 217.06

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Solution

The fourth proportional to 354.36, 530.82 and 217.06 is: 325.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.36 : 530.82 = 217.06 : x
  2. Step 2: Convert to fraction form
    354.36/530.82 = 217.06/x
  3. Step 3: Cross multiply
    354.36x = 530.82 × 217.06
  4. Step 4: Simplify right side
    354.36x = 115,219.79
  5. Step 5: Solve for x
    x = 115,219.79/354.36
  6. Step 6: Final answer
    x = 325.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.