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Finding the Fourth Proportional to 666.08, 919.16 and 371.38

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Solution

The fourth proportional to 666.08, 919.16 and 371.38 is: 512.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.08 : 919.16 = 371.38 : x
  2. Step 2: Convert to fraction form
    666.08/919.16 = 371.38/x
  3. Step 3: Cross multiply
    666.08x = 919.16 × 371.38
  4. Step 4: Simplify right side
    666.08x = 341,357.64
  5. Step 5: Solve for x
    x = 341,357.64/666.08
  6. Step 6: Final answer
    x = 512.49

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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.