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Finding the Fourth Proportional to 666.26, 919.48 and 371.57

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Solution

The fourth proportional to 666.26, 919.48 and 371.57 is: 512.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.26 : 919.48 = 371.57 : x
  2. Step 2: Convert to fraction form
    666.26/919.48 = 371.57/x
  3. Step 3: Cross multiply
    666.26x = 919.48 × 371.57
  4. Step 4: Simplify right side
    666.26x = 341,651.18
  5. Step 5: Solve for x
    x = 341,651.18/666.26
  6. Step 6: Final answer
    x = 512.79

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1.5x scale

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.