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Finding the Fourth Proportional to 572.29, 790.07 and 447.69

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Solution

The fourth proportional to 572.29, 790.07 and 447.69 is: 618.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.29 : 790.07 = 447.69 : x
  2. Step 2: Convert to fraction form
    572.29/790.07 = 447.69/x
  3. Step 3: Cross multiply
    572.29x = 790.07 × 447.69
  4. Step 4: Simplify right side
    572.29x = 353,704.46
  5. Step 5: Solve for x
    x = 353,704.46/572.29
  6. Step 6: Final answer
    x = 618.05

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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.