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Finding the Fourth Proportional to 4,985.54, 6,879.49 and 2,860.50

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Solution

The fourth proportional to 4,985.54, 6,879.49 and 2,860.50 is: 3,947.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,985.54 : 6,879.49 = 2,860.50 : x
  2. Step 2: Convert to fraction form
    4,985.54/6,879.49 = 2,860.50/x
  3. Step 3: Cross multiply
    4,985.54x = 6,879.49 × 2,860.50
  4. Step 4: Simplify right side
    4,985.54x = 19,678,781.15
  5. Step 5: Solve for x
    x = 19,678,781.15/4,985.54
  6. Step 6: Final answer
    x = 3,947.17

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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.