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Finding the Fourth Proportional to 668.71, 922.91 and 373.99

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Solution

The fourth proportional to 668.71, 922.91 and 373.99 is: 516.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.71 : 922.91 = 373.99 : x
  2. Step 2: Convert to fraction form
    668.71/922.91 = 373.99/x
  3. Step 3: Cross multiply
    668.71x = 922.91 × 373.99
  4. Step 4: Simplify right side
    668.71x = 345,159.79
  5. Step 5: Solve for x
    x = 345,159.79/668.71
  6. Step 6: Final answer
    x = 516.16

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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.