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Finding the Fourth Proportional to 684.68, 944.80 and 385.95

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Solution

The fourth proportional to 684.68, 944.80 and 385.95 is: 532.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.68 : 944.80 = 385.95 : x
  2. Step 2: Convert to fraction form
    684.68/944.80 = 385.95/x
  3. Step 3: Cross multiply
    684.68x = 944.80 × 385.95
  4. Step 4: Simplify right side
    684.68x = 364,645.56
  5. Step 5: Solve for x
    x = 364,645.56/684.68
  6. Step 6: Final answer
    x = 532.58

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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.