Home / 3,970.16-5,478.77-2,201.81

Finding the Fourth Proportional to 3,970.16, 5,478.77 and 2,201.81

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Solution

The fourth proportional to 3,970.16, 5,478.77 and 2,201.81 is: 3,038.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.16 : 5,478.77 = 2,201.81 : x
  2. Step 2: Convert to fraction form
    3,970.16/5,478.77 = 2,201.81/x
  3. Step 3: Cross multiply
    3,970.16x = 5,478.77 × 2,201.81
  4. Step 4: Simplify right side
    3,970.16x = 12,063,210.57
  5. Step 5: Solve for x
    x = 12,063,210.57/3,970.16
  6. Step 6: Final answer
    x = 3,038.47

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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.