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Finding the Fourth Proportional to 670.20, 924.38 and 484.31

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Solution

The fourth proportional to 670.20, 924.38 and 484.31 is: 667.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.20 : 924.38 = 484.31 : x
  2. Step 2: Convert to fraction form
    670.20/924.38 = 484.31/x
  3. Step 3: Cross multiply
    670.20x = 924.38 × 484.31
  4. Step 4: Simplify right side
    670.20x = 447,679.43
  5. Step 5: Solve for x
    x = 447,679.43/670.20
  6. Step 6: Final answer
    x = 667.98

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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.