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Finding the Fourth Proportional to 453.74, 626.22 and 320.90

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Solution

The fourth proportional to 453.74, 626.22 and 320.90 is: 442.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.74 : 626.22 = 320.90 : x
  2. Step 2: Convert to fraction form
    453.74/626.22 = 320.90/x
  3. Step 3: Cross multiply
    453.74x = 626.22 × 320.90
  4. Step 4: Simplify right side
    453.74x = 200,950.87
  5. Step 5: Solve for x
    x = 200,950.87/453.74
  6. Step 6: Final answer
    x = 442.88

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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.