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Finding the Fourth Proportional to 453.34, 625.21 and 313.21

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Solution

The fourth proportional to 453.34, 625.21 and 313.21 is: 431.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.34 : 625.21 = 313.21 : x
  2. Step 2: Convert to fraction form
    453.34/625.21 = 313.21/x
  3. Step 3: Cross multiply
    453.34x = 625.21 × 313.21
  4. Step 4: Simplify right side
    453.34x = 195,822.02
  5. Step 5: Solve for x
    x = 195,822.02/453.34
  6. Step 6: Final answer
    x = 431.95

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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.