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Finding the Fourth Proportional to 4,518.74, 6,780.54 and 4,505

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Solution

The fourth proportional to 4,518.74, 6,780.54 and 4,505 is: 6,759.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,518.74 : 6,780.54 = 4,505 : x
  2. Step 2: Convert to fraction form
    4,518.74/6,780.54 = 4,505/x
  3. Step 3: Cross multiply
    4,518.74x = 6,780.54 × 4,505
  4. Step 4: Simplify right side
    4,518.74x = 30,546,332.70
  5. Step 5: Solve for x
    x = 30,546,332.70/4,518.74
  6. Step 6: Final answer
    x = 6,759.92

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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.