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Finding the Fourth Proportional to 668.99, 921.96 and 482.16

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Solution

The fourth proportional to 668.99, 921.96 and 482.16 is: 664.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.99 : 921.96 = 482.16 : x
  2. Step 2: Convert to fraction form
    668.99/921.96 = 482.16/x
  3. Step 3: Cross multiply
    668.99x = 921.96 × 482.16
  4. Step 4: Simplify right side
    668.99x = 444,532.23
  5. Step 5: Solve for x
    x = 444,532.23/668.99
  6. Step 6: Final answer
    x = 664.48

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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.