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Finding the Fourth Proportional to 666.27, 919.38 and 414.27

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Solution

The fourth proportional to 666.27, 919.38 and 414.27 is: 571.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.27 : 919.38 = 414.27 : x
  2. Step 2: Convert to fraction form
    666.27/919.38 = 414.27/x
  3. Step 3: Cross multiply
    666.27x = 919.38 × 414.27
  4. Step 4: Simplify right side
    666.27x = 380,871.55
  5. Step 5: Solve for x
    x = 380,871.55/666.27
  6. Step 6: Final answer
    x = 571.65

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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.