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Finding the Fourth Proportional to 667.10, 999.90 and 358.17

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Solution

The fourth proportional to 667.10, 999.90 and 358.17 is: 536.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.10 : 999.90 = 358.17 : x
  2. Step 2: Convert to fraction form
    667.10/999.90 = 358.17/x
  3. Step 3: Cross multiply
    667.10x = 999.90 × 358.17
  4. Step 4: Simplify right side
    667.10x = 358,134.18
  5. Step 5: Solve for x
    x = 358,134.18/667.10
  6. Step 6: Final answer
    x = 536.85

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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.