Home / 4,172.45-6,259.89-1,978.16

Finding the Fourth Proportional to 4,172.45, 6,259.89 and 1,978.16

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Solution

The fourth proportional to 4,172.45, 6,259.89 and 1,978.16 is: 2,967.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,172.45 : 6,259.89 = 1,978.16 : x
  2. Step 2: Convert to fraction form
    4,172.45/6,259.89 = 1,978.16/x
  3. Step 3: Cross multiply
    4,172.45x = 6,259.89 × 1,978.16
  4. Step 4: Simplify right side
    4,172.45x = 12,383,064.00
  5. Step 5: Solve for x
    x = 12,383,064.00/4,172.45
  6. Step 6: Final answer
    x = 2,967.82

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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.