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Finding the Fourth Proportional to 668.84, 922.99 and 406.94

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Solution

The fourth proportional to 668.84, 922.99 and 406.94 is: 561.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.84 : 922.99 = 406.94 : x
  2. Step 2: Convert to fraction form
    668.84/922.99 = 406.94/x
  3. Step 3: Cross multiply
    668.84x = 922.99 × 406.94
  4. Step 4: Simplify right side
    668.84x = 375,601.55
  5. Step 5: Solve for x
    x = 375,601.55/668.84
  6. Step 6: Final answer
    x = 561.57

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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.