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Finding the Fourth Proportional to 684.68, 944.60 and 385.85

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Solution

The fourth proportional to 684.68, 944.60 and 385.85 is: 532.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.68 : 944.60 = 385.85 : x
  2. Step 2: Convert to fraction form
    684.68/944.60 = 385.85/x
  3. Step 3: Cross multiply
    684.68x = 944.60 × 385.85
  4. Step 4: Simplify right side
    684.68x = 364,467.26
  5. Step 5: Solve for x
    x = 364,467.26/684.68
  6. Step 6: Final answer
    x = 532.32

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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.