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Finding the Fourth Proportional to 665.46, 998.40 and 341.06

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Solution

The fourth proportional to 665.46, 998.40 and 341.06 is: 511.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.46 : 998.40 = 341.06 : x
  2. Step 2: Convert to fraction form
    665.46/998.40 = 341.06/x
  3. Step 3: Cross multiply
    665.46x = 998.40 × 341.06
  4. Step 4: Simplify right side
    665.46x = 340,507.61
  5. Step 5: Solve for x
    x = 340,507.61/665.46
  6. Step 6: Final answer
    x = 511.69

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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.