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Finding the Fourth Proportional to 464.72, 697.08 and 172.16

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Solution

The fourth proportional to 464.72, 697.08 and 172.16 is: 258.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.72 : 697.08 = 172.16 : x
  2. Step 2: Convert to fraction form
    464.72/697.08 = 172.16/x
  3. Step 3: Cross multiply
    464.72x = 697.08 × 172.16
  4. Step 4: Simplify right side
    464.72x = 120,009.29
  5. Step 5: Solve for x
    x = 120,009.29/464.72
  6. Step 6: Final answer
    x = 258.24

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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.