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Finding the Fourth Proportional to 572.28, 858.44 and 379.80

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Solution

The fourth proportional to 572.28, 858.44 and 379.80 is: 569.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.28 : 858.44 = 379.80 : x
  2. Step 2: Convert to fraction form
    572.28/858.44 = 379.80/x
  3. Step 3: Cross multiply
    572.28x = 858.44 × 379.80
  4. Step 4: Simplify right side
    572.28x = 326,035.51
  5. Step 5: Solve for x
    x = 326,035.51/572.28
  6. Step 6: Final answer
    x = 569.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.