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Finding the Fourth Proportional to 628.53, 941.55 and 411.45

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Solution

The fourth proportional to 628.53, 941.55 and 411.45 is: 616.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.53 : 941.55 = 411.45 : x
  2. Step 2: Convert to fraction form
    628.53/941.55 = 411.45/x
  3. Step 3: Cross multiply
    628.53x = 941.55 × 411.45
  4. Step 4: Simplify right side
    628.53x = 387,400.75
  5. Step 5: Solve for x
    x = 387,400.75/628.53
  6. Step 6: Final answer
    x = 616.36

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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.