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Finding the Fourth Proportional to 668.00, 921.88 and 373.31

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Solution

The fourth proportional to 668.00, 921.88 and 373.31 is: 515.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.00 : 921.88 = 373.31 : x
  2. Step 2: Convert to fraction form
    668.00/921.88 = 373.31/x
  3. Step 3: Cross multiply
    668.00x = 921.88 × 373.31
  4. Step 4: Simplify right side
    668.00x = 344,140.55
  5. Step 5: Solve for x
    x = 344,140.55/668.00
  6. Step 6: Final answer
    x = 515.18

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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.