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Finding the Fourth Proportional to 684.34, 944.31 and 385.55

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Solution

The fourth proportional to 684.34, 944.31 and 385.55 is: 532.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.34 : 944.31 = 385.55 : x
  2. Step 2: Convert to fraction form
    684.34/944.31 = 385.55/x
  3. Step 3: Cross multiply
    684.34x = 944.31 × 385.55
  4. Step 4: Simplify right side
    684.34x = 364,076.79
  5. Step 5: Solve for x
    x = 364,076.79/684.34
  6. Step 6: Final answer
    x = 532.01

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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.