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Finding the Fourth Proportional to 567, 781.74 and 419.39

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Solution

The fourth proportional to 567, 781.74 and 419.39 is: 578.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    567 : 781.74 = 419.39 : x
  2. Step 2: Convert to fraction form
    567/781.74 = 419.39/x
  3. Step 3: Cross multiply
    567x = 781.74 × 419.39
  4. Step 4: Simplify right side
    567x = 327,850.03
  5. Step 5: Solve for x
    x = 327,850.03/567
  6. Step 6: Final answer
    x = 578.22

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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.