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Finding the Fourth Proportional to 628.10, 940.50 and 433.70

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Solution

The fourth proportional to 628.10, 940.50 and 433.70 is: 649.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.10 : 940.50 = 433.70 : x
  2. Step 2: Convert to fraction form
    628.10/940.50 = 433.70/x
  3. Step 3: Cross multiply
    628.10x = 940.50 × 433.70
  4. Step 4: Simplify right side
    628.10x = 407,894.85
  5. Step 5: Solve for x
    x = 407,894.85/628.10
  6. Step 6: Final answer
    x = 649.41

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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.