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Finding the Fourth Proportional to 668.64, 922.63 and 373.92

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Solution

The fourth proportional to 668.64, 922.63 and 373.92 is: 515.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.64 : 922.63 = 373.92 : x
  2. Step 2: Convert to fraction form
    668.64/922.63 = 373.92/x
  3. Step 3: Cross multiply
    668.64x = 922.63 × 373.92
  4. Step 4: Simplify right side
    668.64x = 344,989.81
  5. Step 5: Solve for x
    x = 344,989.81/668.64
  6. Step 6: Final answer
    x = 515.96

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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.