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Finding the Fourth Proportional to 670.40, 925.17 and 375.65

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Solution

The fourth proportional to 670.40, 925.17 and 375.65 is: 518.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.40 : 925.17 = 375.65 : x
  2. Step 2: Convert to fraction form
    670.40/925.17 = 375.65/x
  3. Step 3: Cross multiply
    670.40x = 925.17 × 375.65
  4. Step 4: Simplify right side
    670.40x = 347,540.11
  5. Step 5: Solve for x
    x = 347,540.11/670.40
  6. Step 6: Final answer
    x = 518.41

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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.