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Finding the Fourth Proportional to 667.14, 920.38 and 456.98

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Solution

The fourth proportional to 667.14, 920.38 and 456.98 is: 630.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.14 : 920.38 = 456.98 : x
  2. Step 2: Convert to fraction form
    667.14/920.38 = 456.98/x
  3. Step 3: Cross multiply
    667.14x = 920.38 × 456.98
  4. Step 4: Simplify right side
    667.14x = 420,595.25
  5. Step 5: Solve for x
    x = 420,595.25/667.14
  6. Step 6: Final answer
    x = 630.45

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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.