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Finding the Fourth Proportional to 656.76, 984.57 and 266.58

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Solution

The fourth proportional to 656.76, 984.57 and 266.58 is: 399.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.76 : 984.57 = 266.58 : x
  2. Step 2: Convert to fraction form
    656.76/984.57 = 266.58/x
  3. Step 3: Cross multiply
    656.76x = 984.57 × 266.58
  4. Step 4: Simplify right side
    656.76x = 262,466.67
  5. Step 5: Solve for x
    x = 262,466.67/656.76
  6. Step 6: Final answer
    x = 399.64

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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.