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Finding the Fourth Proportional to 670.87, 925.63 and 449.44

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Solution

The fourth proportional to 670.87, 925.63 and 449.44 is: 620.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.87 : 925.63 = 449.44 : x
  2. Step 2: Convert to fraction form
    670.87/925.63 = 449.44/x
  3. Step 3: Cross multiply
    670.87x = 925.63 × 449.44
  4. Step 4: Simplify right side
    670.87x = 416,011.71
  5. Step 5: Solve for x
    x = 416,011.71/670.87
  6. Step 6: Final answer
    x = 620.11

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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.