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Finding the Fourth Proportional to 354.54, 530.87 and 208.17

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Solution

The fourth proportional to 354.54, 530.87 and 208.17 is: 311.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.54 : 530.87 = 208.17 : x
  2. Step 2: Convert to fraction form
    354.54/530.87 = 208.17/x
  3. Step 3: Cross multiply
    354.54x = 530.87 × 208.17
  4. Step 4: Simplify right side
    354.54x = 110,510.17
  5. Step 5: Solve for x
    x = 110,510.17/354.54
  6. Step 6: Final answer
    x = 311.70

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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.