Home / 3,970.16-5,478.60-2,201.64

Finding the Fourth Proportional to 3,970.16, 5,478.60 and 2,201.64

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Solution

The fourth proportional to 3,970.16, 5,478.60 and 2,201.64 is: 3,038.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.16 : 5,478.60 = 2,201.64 : x
  2. Step 2: Convert to fraction form
    3,970.16/5,478.60 = 2,201.64/x
  3. Step 3: Cross multiply
    3,970.16x = 5,478.60 × 2,201.64
  4. Step 4: Simplify right side
    3,970.16x = 12,061,904.90
  5. Step 5: Solve for x
    x = 12,061,904.90/3,970.16
  6. Step 6: Final answer
    x = 3,038.14

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1.5x scale

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.