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Finding the Fourth Proportional to 453.29, 625.64 and 320.47

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Solution

The fourth proportional to 453.29, 625.64 and 320.47 is: 442.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.29 : 625.64 = 320.47 : x
  2. Step 2: Convert to fraction form
    453.29/625.64 = 320.47/x
  3. Step 3: Cross multiply
    453.29x = 625.64 × 320.47
  4. Step 4: Simplify right side
    453.29x = 200,495.68
  5. Step 5: Solve for x
    x = 200,495.68/453.29
  6. Step 6: Final answer
    x = 442.32

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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.