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Finding the Fourth Proportional to 464.90, 697.19 and 140.31

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Solution

The fourth proportional to 464.90, 697.19 and 140.31 is: 210.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.90 : 697.19 = 140.31 : x
  2. Step 2: Convert to fraction form
    464.90/697.19 = 140.31/x
  3. Step 3: Cross multiply
    464.90x = 697.19 × 140.31
  4. Step 4: Simplify right side
    464.90x = 97,822.03
  5. Step 5: Solve for x
    x = 97,822.03/464.90
  6. Step 6: Final answer
    x = 210.42

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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.