Home / 3,970.08-5,478.16-2,644.64

Finding the Fourth Proportional to 3,970.08, 5,478.16 and 2,644.64

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Solution

The fourth proportional to 3,970.08, 5,478.16 and 2,644.64 is: 3,649.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.08 : 5,478.16 = 2,644.64 : x
  2. Step 2: Convert to fraction form
    3,970.08/5,478.16 = 2,644.64/x
  3. Step 3: Cross multiply
    3,970.08x = 5,478.16 × 2,644.64
  4. Step 4: Simplify right side
    3,970.08x = 14,487,761.06
  5. Step 5: Solve for x
    x = 14,487,761.06/3,970.08
  6. Step 6: Final answer
    x = 3,649.24

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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.