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Finding the Fourth Proportional to 665.58, 998.45 and 178.65

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Solution

The fourth proportional to 665.58, 998.45 and 178.65 is: 268.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.58 : 998.45 = 178.65 : x
  2. Step 2: Convert to fraction form
    665.58/998.45 = 178.65/x
  3. Step 3: Cross multiply
    665.58x = 998.45 × 178.65
  4. Step 4: Simplify right side
    665.58x = 178,373.09
  5. Step 5: Solve for x
    x = 178,373.09/665.58
  6. Step 6: Final answer
    x = 268.00

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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.