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Finding the Fourth Proportional to 729.33, 1,006.50 and 445.80

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Solution

The fourth proportional to 729.33, 1,006.50 and 445.80 is: 615.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    729.33 : 1,006.50 = 445.80 : x
  2. Step 2: Convert to fraction form
    729.33/1,006.50 = 445.80/x
  3. Step 3: Cross multiply
    729.33x = 1,006.50 × 445.80
  4. Step 4: Simplify right side
    729.33x = 448,696.65
  5. Step 5: Solve for x
    x = 448,696.65/729.33
  6. Step 6: Final answer
    x = 615.21

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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.