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Finding the Fourth Proportional to 385.84, 529.78 and 329.92

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Solution

The fourth proportional to 385.84, 529.78 and 329.92 is: 453.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.84 : 529.78 = 329.92 : x
  2. Step 2: Convert to fraction form
    385.84/529.78 = 329.92/x
  3. Step 3: Cross multiply
    385.84x = 529.78 × 329.92
  4. Step 4: Simplify right side
    385.84x = 174,785.02
  5. Step 5: Solve for x
    x = 174,785.02/385.84
  6. Step 6: Final answer
    x = 453.00

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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.