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Finding the Fourth Proportional to 666.63, 999.51 and 276.89

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Solution

The fourth proportional to 666.63, 999.51 and 276.89 is: 415.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.63 : 999.51 = 276.89 : x
  2. Step 2: Convert to fraction form
    666.63/999.51 = 276.89/x
  3. Step 3: Cross multiply
    666.63x = 999.51 × 276.89
  4. Step 4: Simplify right side
    666.63x = 276,759.10
  5. Step 5: Solve for x
    x = 276,759.10/666.63
  6. Step 6: Final answer
    x = 415.16

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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.