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Finding the Fourth Proportional to 572.29, 861.53 and 521.26

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Solution

The fourth proportional to 572.29, 861.53 and 521.26 is: 784.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.29 : 861.53 = 521.26 : x
  2. Step 2: Convert to fraction form
    572.29/861.53 = 521.26/x
  3. Step 3: Cross multiply
    572.29x = 861.53 × 521.26
  4. Step 4: Simplify right side
    572.29x = 449,076.37
  5. Step 5: Solve for x
    x = 449,076.37/572.29
  6. Step 6: Final answer
    x = 784.70

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.