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Finding the Fourth Proportional to 669.77, 921.92 and 482.96

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Solution

The fourth proportional to 669.77, 921.92 and 482.96 is: 664.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.77 : 921.92 = 482.96 : x
  2. Step 2: Convert to fraction form
    669.77/921.92 = 482.96/x
  3. Step 3: Cross multiply
    669.77x = 921.92 × 482.96
  4. Step 4: Simplify right side
    669.77x = 445,250.37
  5. Step 5: Solve for x
    x = 445,250.37/669.77
  6. Step 6: Final answer
    x = 664.78

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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.