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Finding the Fourth Proportional to 628.76, 943.37 and 385.46

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Solution

The fourth proportional to 628.76, 943.37 and 385.46 is: 578.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.76 : 943.37 = 385.46 : x
  2. Step 2: Convert to fraction form
    628.76/943.37 = 385.46/x
  3. Step 3: Cross multiply
    628.76x = 943.37 × 385.46
  4. Step 4: Simplify right side
    628.76x = 363,631.40
  5. Step 5: Solve for x
    x = 363,631.40/628.76
  6. Step 6: Final answer
    x = 578.33

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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.