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Finding the Fourth Proportional to 667.19, 920.57 and 454.56

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Solution

The fourth proportional to 667.19, 920.57 and 454.56 is: 627.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.19 : 920.57 = 454.56 : x
  2. Step 2: Convert to fraction form
    667.19/920.57 = 454.56/x
  3. Step 3: Cross multiply
    667.19x = 920.57 × 454.56
  4. Step 4: Simplify right side
    667.19x = 418,452.03
  5. Step 5: Solve for x
    x = 418,452.03/667.19
  6. Step 6: Final answer
    x = 627.19

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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.