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Finding the Fourth Proportional to 667.15, 999.45 and 358.90

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Solution

The fourth proportional to 667.15, 999.45 and 358.90 is: 537.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.15 : 999.45 = 358.90 : x
  2. Step 2: Convert to fraction form
    667.15/999.45 = 358.90/x
  3. Step 3: Cross multiply
    667.15x = 999.45 × 358.90
  4. Step 4: Simplify right side
    667.15x = 358,702.61
  5. Step 5: Solve for x
    x = 358,702.61/667.15
  6. Step 6: Final answer
    x = 537.66

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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.