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Finding the Fourth Proportional to 464.78, 697.50 and 156.78

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Solution

The fourth proportional to 464.78, 697.50 and 156.78 is: 235.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.78 : 697.50 = 156.78 : x
  2. Step 2: Convert to fraction form
    464.78/697.50 = 156.78/x
  3. Step 3: Cross multiply
    464.78x = 697.50 × 156.78
  4. Step 4: Simplify right side
    464.78x = 109,354.05
  5. Step 5: Solve for x
    x = 109,354.05/464.78
  6. Step 6: Final answer
    x = 235.28

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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.