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Finding the Fourth Proportional to 636.70, 955.05 and 623.20

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Solution

The fourth proportional to 636.70, 955.05 and 623.20 is: 934.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.70 : 955.05 = 623.20 : x
  2. Step 2: Convert to fraction form
    636.70/955.05 = 623.20/x
  3. Step 3: Cross multiply
    636.70x = 955.05 × 623.20
  4. Step 4: Simplify right side
    636.70x = 595,187.16
  5. Step 5: Solve for x
    x = 595,187.16/636.70
  6. Step 6: Final answer
    x = 934.80

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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.