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Finding the Fourth Proportional to 670.51, 925.46 and 408.70

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Solution

The fourth proportional to 670.51, 925.46 and 408.70 is: 564.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.51 : 925.46 = 408.70 : x
  2. Step 2: Convert to fraction form
    670.51/925.46 = 408.70/x
  3. Step 3: Cross multiply
    670.51x = 925.46 × 408.70
  4. Step 4: Simplify right side
    670.51x = 378,235.50
  5. Step 5: Solve for x
    x = 378,235.50/670.51
  6. Step 6: Final answer
    x = 564.10

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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.