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Finding the Fourth Proportional to 454.91, 628.00 and 322.40

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Solution

The fourth proportional to 454.91, 628.00 and 322.40 is: 445.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.91 : 628.00 = 322.40 : x
  2. Step 2: Convert to fraction form
    454.91/628.00 = 322.40/x
  3. Step 3: Cross multiply
    454.91x = 628.00 × 322.40
  4. Step 4: Simplify right side
    454.91x = 202,467.96
  5. Step 5: Solve for x
    x = 202,467.96/454.91
  6. Step 6: Final answer
    x = 445.08

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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.