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Finding the Fourth Proportional to 687.68, 944.08 and 609.92

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Solution

The fourth proportional to 687.68, 944.08 and 609.92 is: 837.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.68 : 944.08 = 609.92 : x
  2. Step 2: Convert to fraction form
    687.68/944.08 = 609.92/x
  3. Step 3: Cross multiply
    687.68x = 944.08 × 609.92
  4. Step 4: Simplify right side
    687.68x = 575,813.27
  5. Step 5: Solve for x
    x = 575,813.27/687.68
  6. Step 6: Final answer
    x = 837.33

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.