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Finding the Fourth Proportional to 637.68, 955.38 and 491.70

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Solution

The fourth proportional to 637.68, 955.38 and 491.70 is: 736.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.68 : 955.38 = 491.70 : x
  2. Step 2: Convert to fraction form
    637.68/955.38 = 491.70/x
  3. Step 3: Cross multiply
    637.68x = 955.38 × 491.70
  4. Step 4: Simplify right side
    637.68x = 469,760.35
  5. Step 5: Solve for x
    x = 469,760.35/637.68
  6. Step 6: Final answer
    x = 736.67

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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.