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Finding the Fourth Proportional to 421.04, 628.95 and 323.51

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Solution

The fourth proportional to 421.04, 628.95 and 323.51 is: 483.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.04 : 628.95 = 323.51 : x
  2. Step 2: Convert to fraction form
    421.04/628.95 = 323.51/x
  3. Step 3: Cross multiply
    421.04x = 628.95 × 323.51
  4. Step 4: Simplify right side
    421.04x = 203,468.47
  5. Step 5: Solve for x
    x = 203,468.47/421.04
  6. Step 6: Final answer
    x = 483.26

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.