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Finding the Fourth Proportional to 567.87, 784.26 and 391.29

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Solution

The fourth proportional to 567.87, 784.26 and 391.29 is: 540.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    567.87 : 784.26 = 391.29 : x
  2. Step 2: Convert to fraction form
    567.87/784.26 = 391.29/x
  3. Step 3: Cross multiply
    567.87x = 784.26 × 391.29
  4. Step 4: Simplify right side
    567.87x = 306,873.10
  5. Step 5: Solve for x
    x = 306,873.10/567.87
  6. Step 6: Final answer
    x = 540.39

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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.