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Finding the Fourth Proportional to 636.20, 952.95 and 555.20

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Solution

The fourth proportional to 636.20, 952.95 and 555.20 is: 831.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.20 : 952.95 = 555.20 : x
  2. Step 2: Convert to fraction form
    636.20/952.95 = 555.20/x
  3. Step 3: Cross multiply
    636.20x = 952.95 × 555.20
  4. Step 4: Simplify right side
    636.20x = 529,077.84
  5. Step 5: Solve for x
    x = 529,077.84/636.20
  6. Step 6: Final answer
    x = 831.62

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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.