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Finding the Fourth Proportional to 662.67, 992.54 and 415.07

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Solution

The fourth proportional to 662.67, 992.54 and 415.07 is: 621.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.67 : 992.54 = 415.07 : x
  2. Step 2: Convert to fraction form
    662.67/992.54 = 415.07/x
  3. Step 3: Cross multiply
    662.67x = 992.54 × 415.07
  4. Step 4: Simplify right side
    662.67x = 411,970.00
  5. Step 5: Solve for x
    x = 411,970.00/662.67
  6. Step 6: Final answer
    x = 621.68

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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.