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Finding the Fourth Proportional to 443.76, 660.72 and 441.60

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Solution

The fourth proportional to 443.76, 660.72 and 441.60 is: 657.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.76 : 660.72 = 441.60 : x
  2. Step 2: Convert to fraction form
    443.76/660.72 = 441.60/x
  3. Step 3: Cross multiply
    443.76x = 660.72 × 441.60
  4. Step 4: Simplify right side
    443.76x = 291,773.95
  5. Step 5: Solve for x
    x = 291,773.95/443.76
  6. Step 6: Final answer
    x = 657.50

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.