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Finding the Fourth Proportional to 665.97, 919.06 and 371.23

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Solution

The fourth proportional to 665.97, 919.06 and 371.23 is: 512.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.97 : 919.06 = 371.23 : x
  2. Step 2: Convert to fraction form
    665.97/919.06 = 371.23/x
  3. Step 3: Cross multiply
    665.97x = 919.06 × 371.23
  4. Step 4: Simplify right side
    665.97x = 341,182.64
  5. Step 5: Solve for x
    x = 341,182.64/665.97
  6. Step 6: Final answer
    x = 512.31

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.