Home / 3,970.48-5,479.19-2,178.00

Finding the Fourth Proportional to 3,970.48, 5,479.19 and 2,178.00

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Solution

The fourth proportional to 3,970.48, 5,479.19 and 2,178.00 is: 3,005.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.48 : 5,479.19 = 2,178.00 : x
  2. Step 2: Convert to fraction form
    3,970.48/5,479.19 = 2,178.00/x
  3. Step 3: Cross multiply
    3,970.48x = 5,479.19 × 2,178.00
  4. Step 4: Simplify right side
    3,970.48x = 11,933,669.94
  5. Step 5: Solve for x
    x = 11,933,669.94/3,970.48
  6. Step 6: Final answer
    x = 3,005.60

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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.