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Finding the Fourth Proportional to 572.75, 790.40 and 324.07

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Solution

The fourth proportional to 572.75, 790.40 and 324.07 is: 447.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.75 : 790.40 = 324.07 : x
  2. Step 2: Convert to fraction form
    572.75/790.40 = 324.07/x
  3. Step 3: Cross multiply
    572.75x = 790.40 × 324.07
  4. Step 4: Simplify right side
    572.75x = 256,142.95
  5. Step 5: Solve for x
    x = 256,142.95/572.75
  6. Step 6: Final answer
    x = 447.21

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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.