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Finding the Fourth Proportional to 667.71, 921.43 and 364.88

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Solution

The fourth proportional to 667.71, 921.43 and 364.88 is: 503.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.71 : 921.43 = 364.88 : x
  2. Step 2: Convert to fraction form
    667.71/921.43 = 364.88/x
  3. Step 3: Cross multiply
    667.71x = 921.43 × 364.88
  4. Step 4: Simplify right side
    667.71x = 336,211.38
  5. Step 5: Solve for x
    x = 336,211.38/667.71
  6. Step 6: Final answer
    x = 503.53

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1.5x scale

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.