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Finding the Fourth Proportional to 666.66, 999.59 and 341.85

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Solution

The fourth proportional to 666.66, 999.59 and 341.85 is: 512.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.66 : 999.59 = 341.85 : x
  2. Step 2: Convert to fraction form
    666.66/999.59 = 341.85/x
  3. Step 3: Cross multiply
    666.66x = 999.59 × 341.85
  4. Step 4: Simplify right side
    666.66x = 341,713.80
  5. Step 5: Solve for x
    x = 341,713.80/666.66
  6. Step 6: Final answer
    x = 512.57

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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.