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Finding the Fourth Proportional to 666.24, 999.12 and 378.24

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Solution

The fourth proportional to 666.24, 999.12 and 378.24 is: 567.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.24 : 999.12 = 378.24 : x
  2. Step 2: Convert to fraction form
    666.24/999.12 = 378.24/x
  3. Step 3: Cross multiply
    666.24x = 999.12 × 378.24
  4. Step 4: Simplify right side
    666.24x = 377,907.15
  5. Step 5: Solve for x
    x = 377,907.15/666.24
  6. Step 6: Final answer
    x = 567.22

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1.5x scale

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.