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Finding the Fourth Proportional to 688.28, 949.82 and 373.55

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Solution

The fourth proportional to 688.28, 949.82 and 373.55 is: 515.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.28 : 949.82 = 373.55 : x
  2. Step 2: Convert to fraction form
    688.28/949.82 = 373.55/x
  3. Step 3: Cross multiply
    688.28x = 949.82 × 373.55
  4. Step 4: Simplify right side
    688.28x = 354,805.04
  5. Step 5: Solve for x
    x = 354,805.04/688.28
  6. Step 6: Final answer
    x = 515.49

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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.