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Finding the Fourth Proportional to 666.27, 919.55 and 480.37

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Solution

The fourth proportional to 666.27, 919.55 and 480.37 is: 662.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.27 : 919.55 = 480.37 : x
  2. Step 2: Convert to fraction form
    666.27/919.55 = 480.37/x
  3. Step 3: Cross multiply
    666.27x = 919.55 × 480.37
  4. Step 4: Simplify right side
    666.27x = 441,724.23
  5. Step 5: Solve for x
    x = 441,724.23/666.27
  6. Step 6: Final answer
    x = 662.98

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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.