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Finding the Fourth Proportional to 2,878.75, 4,320.15 and 1,647.16

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Solution

The fourth proportional to 2,878.75, 4,320.15 and 1,647.16 is: 2,471.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,878.75 : 4,320.15 = 1,647.16 : x
  2. Step 2: Convert to fraction form
    2,878.75/4,320.15 = 1,647.16/x
  3. Step 3: Cross multiply
    2,878.75x = 4,320.15 × 1,647.16
  4. Step 4: Simplify right side
    2,878.75x = 7,115,978.27
  5. Step 5: Solve for x
    x = 7,115,978.27/2,878.75
  6. Step 6: Final answer
    x = 2,471.90

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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.