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Finding the Fourth Proportional to 660.87, 990.59 and 295.16

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Solution

The fourth proportional to 660.87, 990.59 and 295.16 is: 442.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.87 : 990.59 = 295.16 : x
  2. Step 2: Convert to fraction form
    660.87/990.59 = 295.16/x
  3. Step 3: Cross multiply
    660.87x = 990.59 × 295.16
  4. Step 4: Simplify right side
    660.87x = 292,377.59
  5. Step 5: Solve for x
    x = 292,377.59/660.87
  6. Step 6: Final answer
    x = 442.41

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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.