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Finding the Fourth Proportional to 670.43, 925.17 and 375.70

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Solution

The fourth proportional to 670.43, 925.17 and 375.70 is: 518.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.43 : 925.17 = 375.70 : x
  2. Step 2: Convert to fraction form
    670.43/925.17 = 375.70/x
  3. Step 3: Cross multiply
    670.43x = 925.17 × 375.70
  4. Step 4: Simplify right side
    670.43x = 347,579.86
  5. Step 5: Solve for x
    x = 347,579.86/670.43
  6. Step 6: Final answer
    x = 518.45

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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.