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Finding the Fourth Proportional to 666.06, 992.90 and 629.58

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Solution

The fourth proportional to 666.06, 992.90 and 629.58 is: 938.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.06 : 992.90 = 629.58 : x
  2. Step 2: Convert to fraction form
    666.06/992.90 = 629.58/x
  3. Step 3: Cross multiply
    666.06x = 992.90 × 629.58
  4. Step 4: Simplify right side
    666.06x = 625,106.83
  5. Step 5: Solve for x
    x = 625,106.83/666.06
  6. Step 6: Final answer
    x = 938.51

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.