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Finding the Fourth Proportional to 660.86, 991.50 and 295.60

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Solution

The fourth proportional to 660.86, 991.50 and 295.60 is: 443.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.86 : 991.50 = 295.60 : x
  2. Step 2: Convert to fraction form
    660.86/991.50 = 295.60/x
  3. Step 3: Cross multiply
    660.86x = 991.50 × 295.60
  4. Step 4: Simplify right side
    660.86x = 293,087.40
  5. Step 5: Solve for x
    x = 293,087.40/660.86
  6. Step 6: Final answer
    x = 443.49

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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.