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Finding the Fourth Proportional to 464.76, 697.42 and 221.30

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Solution

The fourth proportional to 464.76, 697.42 and 221.30 is: 332.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.76 : 697.42 = 221.30 : x
  2. Step 2: Convert to fraction form
    464.76/697.42 = 221.30/x
  3. Step 3: Cross multiply
    464.76x = 697.42 × 221.30
  4. Step 4: Simplify right side
    464.76x = 154,339.05
  5. Step 5: Solve for x
    x = 154,339.05/464.76
  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.