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Finding the Fourth Proportional to 628.02, 940.41 and 432.81

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Solution

The fourth proportional to 628.02, 940.41 and 432.81 is: 648.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.02 : 940.41 = 432.81 : x
  2. Step 2: Convert to fraction form
    628.02/940.41 = 432.81/x
  3. Step 3: Cross multiply
    628.02x = 940.41 × 432.81
  4. Step 4: Simplify right side
    628.02x = 407,018.85
  5. Step 5: Solve for x
    x = 407,018.85/628.02
  6. Step 6: Final answer
    x = 648.10

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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.