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Finding the Fourth Proportional to 572.57, 790.36 and 439.53

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Solution

The fourth proportional to 572.57, 790.36 and 439.53 is: 606.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.57 : 790.36 = 439.53 : x
  2. Step 2: Convert to fraction form
    572.57/790.36 = 439.53/x
  3. Step 3: Cross multiply
    572.57x = 790.36 × 439.53
  4. Step 4: Simplify right side
    572.57x = 347,382.87
  5. Step 5: Solve for x
    x = 347,382.87/572.57
  6. Step 6: Final answer
    x = 606.71

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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.