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Finding the Fourth Proportional to 529.72, 794.74 and 221.72

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Solution

The fourth proportional to 529.72, 794.74 and 221.72 is: 332.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.72 : 794.74 = 221.72 : x
  2. Step 2: Convert to fraction form
    529.72/794.74 = 221.72/x
  3. Step 3: Cross multiply
    529.72x = 794.74 × 221.72
  4. Step 4: Simplify right side
    529.72x = 176,209.75
  5. Step 5: Solve for x
    x = 176,209.75/529.72
  6. Step 6: Final answer
    x = 332.65

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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.