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Finding the Fourth Proportional to 529.81, 794.72 and 385.09

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Solution

The fourth proportional to 529.81, 794.72 and 385.09 is: 577.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.81 : 794.72 = 385.09 : x
  2. Step 2: Convert to fraction form
    529.81/794.72 = 385.09/x
  3. Step 3: Cross multiply
    529.81x = 794.72 × 385.09
  4. Step 4: Simplify right side
    529.81x = 306,036.80
  5. Step 5: Solve for x
    x = 306,036.80/529.81
  6. Step 6: Final answer
    x = 577.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.