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Finding the Fourth Proportional to 660.55, 990.87 and 295.24

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Solution

The fourth proportional to 660.55, 990.87 and 295.24 is: 442.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.55 : 990.87 = 295.24 : x
  2. Step 2: Convert to fraction form
    660.55/990.87 = 295.24/x
  3. Step 3: Cross multiply
    660.55x = 990.87 × 295.24
  4. Step 4: Simplify right side
    660.55x = 292,544.46
  5. Step 5: Solve for x
    x = 292,544.46/660.55
  6. Step 6: Final answer
    x = 442.88

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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.