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Finding the Fourth Proportional to 628.30, 940.65 and 556.30

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Solution

The fourth proportional to 628.30, 940.65 and 556.30 is: 832.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.30 : 940.65 = 556.30 : x
  2. Step 2: Convert to fraction form
    628.30/940.65 = 556.30/x
  3. Step 3: Cross multiply
    628.30x = 940.65 × 556.30
  4. Step 4: Simplify right side
    628.30x = 523,283.60
  5. Step 5: Solve for x
    x = 523,283.60/628.30
  6. Step 6: Final answer
    x = 832.86

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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.