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Finding the Fourth Proportional to 668.94, 921.81 and 482.10

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Solution

The fourth proportional to 668.94, 921.81 and 482.10 is: 664.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.94 : 921.81 = 482.10 : x
  2. Step 2: Convert to fraction form
    668.94/921.81 = 482.10/x
  3. Step 3: Cross multiply
    668.94x = 921.81 × 482.10
  4. Step 4: Simplify right side
    668.94x = 444,404.60
  5. Step 5: Solve for x
    x = 444,404.60/668.94
  6. Step 6: Final answer
    x = 664.34

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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.