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Finding the Fourth Proportional to 529.75, 794.64 and 221.38

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Solution

The fourth proportional to 529.75, 794.64 and 221.38 is: 332.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.75 : 794.64 = 221.38 : x
  2. Step 2: Convert to fraction form
    529.75/794.64 = 221.38/x
  3. Step 3: Cross multiply
    529.75x = 794.64 × 221.38
  4. Step 4: Simplify right side
    529.75x = 175,917.40
  5. Step 5: Solve for x
    x = 175,917.40/529.75
  6. Step 6: Final answer
    x = 332.08

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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.