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Finding the Fourth Proportional to 638.48, 958.54 and 612.48

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Solution

The fourth proportional to 638.48, 958.54 and 612.48 is: 919.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.48 : 958.54 = 612.48 : x
  2. Step 2: Convert to fraction form
    638.48/958.54 = 612.48/x
  3. Step 3: Cross multiply
    638.48x = 958.54 × 612.48
  4. Step 4: Simplify right side
    638.48x = 587,086.58
  5. Step 5: Solve for x
    x = 587,086.58/638.48
  6. Step 6: Final answer
    x = 919.51

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1.5x scale

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.