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Finding the Fourth Proportional to 693.48, 956.84 and 431.31

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Solution

The fourth proportional to 693.48, 956.84 and 431.31 is: 595.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.48 : 956.84 = 431.31 : x
  2. Step 2: Convert to fraction form
    693.48/956.84 = 431.31/x
  3. Step 3: Cross multiply
    693.48x = 956.84 × 431.31
  4. Step 4: Simplify right side
    693.48x = 412,692.50
  5. Step 5: Solve for x
    x = 412,692.50/693.48
  6. Step 6: Final answer
    x = 595.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.