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Finding the Fourth Proportional to 670.69, 925.52 and 408.66

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Solution

The fourth proportional to 670.69, 925.52 and 408.66 is: 563.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.69 : 925.52 = 408.66 : x
  2. Step 2: Convert to fraction form
    670.69/925.52 = 408.66/x
  3. Step 3: Cross multiply
    670.69x = 925.52 × 408.66
  4. Step 4: Simplify right side
    670.69x = 378,223.00
  5. Step 5: Solve for x
    x = 378,223.00/670.69
  6. Step 6: Final answer
    x = 563.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.