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Finding the Fourth Proportional to 539.90, 811.05 and 377.90

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Solution

The fourth proportional to 539.90, 811.05 and 377.90 is: 567.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.90 : 811.05 = 377.90 : x
  2. Step 2: Convert to fraction form
    539.90/811.05 = 377.90/x
  3. Step 3: Cross multiply
    539.90x = 811.05 × 377.90
  4. Step 4: Simplify right side
    539.90x = 306,495.80
  5. Step 5: Solve for x
    x = 306,495.80/539.90
  6. Step 6: Final answer
    x = 567.69

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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.