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Finding the Fourth Proportional to 1,636.14, 2,454.45 and 540.78

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Solution

The fourth proportional to 1,636.14, 2,454.45 and 540.78 is: 811.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,636.14 : 2,454.45 = 540.78 : x
  2. Step 2: Convert to fraction form
    1,636.14/2,454.45 = 540.78/x
  3. Step 3: Cross multiply
    1,636.14x = 2,454.45 × 540.78
  4. Step 4: Simplify right side
    1,636.14x = 1,327,317.47
  5. Step 5: Solve for x
    x = 1,327,317.47/1,636.14
  6. Step 6: Final answer
    x = 811.25

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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.