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Finding the Fourth Proportional to 656.20, 901.37 and 636.76

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Solution

The fourth proportional to 656.20, 901.37 and 636.76 is: 874.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.20 : 901.37 = 636.76 : x
  2. Step 2: Convert to fraction form
    656.20/901.37 = 636.76/x
  3. Step 3: Cross multiply
    656.20x = 901.37 × 636.76
  4. Step 4: Simplify right side
    656.20x = 573,956.36
  5. Step 5: Solve for x
    x = 573,956.36/656.20
  6. Step 6: Final answer
    x = 874.67

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.