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Finding the Fourth Proportional to 682.32, 940.50 and 472.80

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Solution

The fourth proportional to 682.32, 940.50 and 472.80 is: 651.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.32 : 940.50 = 472.80 : x
  2. Step 2: Convert to fraction form
    682.32/940.50 = 472.80/x
  3. Step 3: Cross multiply
    682.32x = 940.50 × 472.80
  4. Step 4: Simplify right side
    682.32x = 444,668.40
  5. Step 5: Solve for x
    x = 444,668.40/682.32
  6. Step 6: Final answer
    x = 651.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.