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Finding the Fourth Proportional to 666.69, 1,000.32 and 358.18

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Solution

The fourth proportional to 666.69, 1,000.32 and 358.18 is: 537.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.69 : 1,000.32 = 358.18 : x
  2. Step 2: Convert to fraction form
    666.69/1,000.32 = 358.18/x
  3. Step 3: Cross multiply
    666.69x = 1,000.32 × 358.18
  4. Step 4: Simplify right side
    666.69x = 358,294.62
  5. Step 5: Solve for x
    x = 358,294.62/666.69
  6. Step 6: Final answer
    x = 537.42

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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.