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Finding the Fourth Proportional to 637.99, 956.45 and 345.31

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Solution

The fourth proportional to 637.99, 956.45 and 345.31 is: 517.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.99 : 956.45 = 345.31 : x
  2. Step 2: Convert to fraction form
    637.99/956.45 = 345.31/x
  3. Step 3: Cross multiply
    637.99x = 956.45 × 345.31
  4. Step 4: Simplify right side
    637.99x = 330,270.02
  5. Step 5: Solve for x
    x = 330,270.02/637.99
  6. Step 6: Final answer
    x = 517.67

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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.