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Finding the Fourth Proportional to 425.30, 636.71 and 323.00

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Solution

The fourth proportional to 425.30, 636.71 and 323.00 is: 483.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.30 : 636.71 = 323.00 : x
  2. Step 2: Convert to fraction form
    425.30/636.71 = 323.00/x
  3. Step 3: Cross multiply
    425.30x = 636.71 × 323.00
  4. Step 4: Simplify right side
    425.30x = 205,652.53
  5. Step 5: Solve for x
    x = 205,652.53/425.30
  6. Step 6: Final answer
    x = 483.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.