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Finding the Fourth Proportional to 682.48, 944.05 and 638.41

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Solution

The fourth proportional to 682.48, 944.05 and 638.41 is: 883.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.48 : 944.05 = 638.41 : x
  2. Step 2: Convert to fraction form
    682.48/944.05 = 638.41/x
  3. Step 3: Cross multiply
    682.48x = 944.05 × 638.41
  4. Step 4: Simplify right side
    682.48x = 602,685.52
  5. Step 5: Solve for x
    x = 602,685.52/682.48
  6. Step 6: Final answer
    x = 883.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.