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Finding the Fourth Proportional to 666.08, 919.20 and 371.36

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Solution

The fourth proportional to 666.08, 919.20 and 371.36 is: 512.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.08 : 919.20 = 371.36 : x
  2. Step 2: Convert to fraction form
    666.08/919.20 = 371.36/x
  3. Step 3: Cross multiply
    666.08x = 919.20 × 371.36
  4. Step 4: Simplify right side
    666.08x = 341,354.11
  5. Step 5: Solve for x
    x = 341,354.11/666.08
  6. Step 6: Final answer
    x = 512.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.