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Finding the Fourth Proportional to 666.18, 998.40 and 357.67

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Solution

The fourth proportional to 666.18, 998.40 and 357.67 is: 536.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.18 : 998.40 = 357.67 : x
  2. Step 2: Convert to fraction form
    666.18/998.40 = 357.67/x
  3. Step 3: Cross multiply
    666.18x = 998.40 × 357.67
  4. Step 4: Simplify right side
    666.18x = 357,098.08
  5. Step 5: Solve for x
    x = 357,098.08/666.18
  6. Step 6: Final answer
    x = 536.04

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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.